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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"  
  "http://www.w3.org/TR/html4/loose.dtd">  
<html > 
<head><title>Syntax</title> 
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> 
<meta name="generator" content="TeX4ht (http://www.cse.ohio-state.edu/~gurari/TeX4ht/)"> 
<meta name="originator" content="TeX4ht (http://www.cse.ohio-state.edu/~gurari/TeX4ht/)"> 
<!-- 3,html --> 
<meta name="src" content="nipguide.tex"> 
<meta name="date" content="2014-01-18 12:46:00"> 
<link rel="stylesheet" type="text/css" href="nipguide.css"> 
</head><body 
>
  <!--l. 50--><div class="crosslinks"><p class="noindent">[<a 
href="nipguidese25.html" >next</a>] [<a 
href="nipguidese23.html" >prev</a>] [<a 
href="nipguidese23.html#tailnipguidese23.html" >prev-tail</a>] [<a 
href="#tailnipguidese24.html">tail</a>] [<a 
href="nipguidech6.html#nipguidese24.html" >up</a>] </p></div>
  <h3 class="sectionHead"><span class="titlemark">6.3    </span> <a 
 id="x34-600006.3"></a>Syntax</h3>
<!--l. 52--><p class="noindent" >The most basic sort of definition looks like this:
                                                 <div class="verbatim" id="verbatim-20">
  //&#x00A0;very&#x00A0;simple!
 &#x00A0;<br />fred&#x00A0;=&#x00A0;12 
</div>
<!--l. 57--><p class="nopar" >
<!--l. 59--><p class="noindent" >This defines a function called <span 
class="phvr7t-x-x-80">fred </span>whose value is the
number 12. The <span 
class="phvr7t-x-x-80">// </span>marks a comment: everything to the end
of the line is skipped. Case is distinguished, so <span 
class="phvr7t-x-x-80">Fred </span>and
<span 
class="phvr7t-x-x-80">fred </span>are two different functions. You can use letters,
numbers, underscores and single quotes in function
names.
<!--l. 65--><p class="indent" >    You can have patterns on the left of the equals sign. For
example:
                                                                                       

                                                                                       
  <div class="verbatim" id="verbatim-21">
[fred,&#x00A0;petra]&#x00A0;=&#x00A0;[12,&#x00A0;13]
</div>
<!--l. 69--><p class="nopar" >
<!--l. 71--><p class="noindent" >defines <span 
class="phvr7t-x-x-80">fred </span>to have the value 12 and <span 
class="phvr7t-x-x-80">petra </span>to have the value
13. See <span 
class="cmsy-10">§</span><a 
href="nipguidese30.html#x41-730006.9">6.9<!--tex4ht:ref: sec:pattern --></a> for details.
<!--l. 75--><p class="indent" >  Functions may take parameters:
                                                 <div class="verbatim" id="verbatim-22">
  /&#x22C6;&#x00A0;A&#x00A0;function&#x00A0;with&#x00A0;parameters.
 &#x00A0;<br />&#x00A0;&#x22C6;/
 &#x00A0;<br />jim&#x00A0;a&#x00A0;b&#x00A0;=&#x00A0;a&#x00A0;+&#x00A0;b&#x00A0;+&#x00A0;12 
</div>
<!--l. 81--><p class="nopar" >
<!--l. 83--><p class="noindent" >This defines a function called <span 
class="phvr7t-x-x-80">jim </span>which takes two parameters
and whose value is the sum of the two parameters, plus 12.
The <span 
class="phvr7t-x-x-80">/* </span>and <span 
class="phvr7t-x-x-80">*/ </span>enclose a multi-line comment.
<!--l. 88--><p class="indent" >    Functions may have several right-hand-sides, each
right-hand-side qualified by a guard expression. Guards are
tested from top to bottom and the first guard which has the
value <span 
class="phvr7t-x-x-80">true </span>causes the function to have the value of that
right-hand-side. If no guard evaluates to <span 
class="phvr7t-x-x-80">true</span>, then the last
right-hand-side is used.
                                                                                       

                                                                                       
  <div class="verbatim" id="verbatim-23">
jenny&#x00A0;a&#x00A0;b
&#x00A0;<br />&#x00A0;&#x00A0;=&#x00A0;42,&#x00A0;a&#x00A0;+&#x00A0;b&#x00A0;&#x003E;=&#x00A0;100
&#x00A0;<br />&#x00A0;&#x00A0;=&#x00A0;43,&#x00A0;a&#x00A0;+&#x00A0;b&#x00A0;&#x003E;=&#x00A0;50
&#x00A0;<br />&#x00A0;&#x00A0;=&#x00A0;44
</div>
<!--l. 99--><p class="nopar" >
<!--l. 101--><p class="noindent" >This defines a function called <span 
class="phvr7t-x-x-80">jenny </span>which takes two
parameters and whose value is 42 if the sum of the
parameters is 100 or greater; 43 if the sum is greater than or
equal to 50 but less than 100; and 44 if the sum is less than
50.
<!--l. 107--><p class="indent" >  Any function may be followed by any number of local
functions, enclosed in curly braces. So <span 
class="phvr7t-x-x-80">jenny </span>could be
written as:
                                                 <div class="verbatim" id="verbatim-24">
  jenny&#x00A0;a&#x00A0;b
 &#x00A0;<br />&#x00A0;&#x00A0;=&#x00A0;42,&#x00A0;sum&#x00A0;&#x003E;=&#x00A0;100
 &#x00A0;<br />&#x00A0;&#x00A0;=&#x00A0;43,&#x00A0;sum&#x00A0;&#x003E;=&#x00A0;50
 &#x00A0;<br />&#x00A0;&#x00A0;=&#x00A0;44
 &#x00A0;<br />{
 &#x00A0;<br />&#x00A0;&#x00A0;sum&#x00A0;=&#x00A0;a&#x00A0;+&#x00A0;b;
 &#x00A0;<br />} 
</div>
<!--l. 118--><p class="nopar" >
<!--l. 120--><p class="noindent" >Note that you need a semi-colon after each local function. A
local function may refer to anything in an enclosing scope,
including itself.
<!--l. 124--><p class="indent" >    You can write <span 
class="phvr7t-x-x-80">if-then-else </span>expressions:
                                                                                       

                                                                                       
  <div class="verbatim" id="verbatim-25">
david&#x00A0;a&#x00A0;=&#x00A0;if&#x00A0;a&#x00A0;&#x003C;&#x00A0;12&#x00A0;then&#x00A0;"my&#x00A0;cat"
&#x00A0;<br />&#x00A0;&#x00A0;else&#x00A0;"likes&#x00A0;lasagne"
</div>
<!--l. 129--><p class="nopar" >
<!--l. 131--><p class="noindent" >This is exactly equivalent to:
                                                 <div class="verbatim" id="verbatim-26">
  david&#x00A0;a
 &#x00A0;<br />&#x00A0;&#x00A0;=&#x00A0;"my&#x00A0;cat",&#x00A0;a&#x00A0;&#x003C;&#x00A0;12
 &#x00A0;<br />&#x00A0;&#x00A0;=&#x00A0;"likes&#x00A0;lasagne" 
</div>
<!--l. 138--><p class="nopar" >
<!--l. 140--><p class="noindent" ><span 
class="phvr7t-x-x-80">if-then-else </span>expressions are sometimes easier to read than
guards.
<!--l. 143--><p class="indent" >    Functions application is with spaces (juxtaposition). For
example:
                                                                                       

                                                                                       
  <div class="verbatim" id="verbatim-27">
harry&#x00A0;=&#x00A0;jim&#x00A0;2&#x00A0;3
</div>
<!--l. 147--><p class="nopar" >
<!--l. 149--><p class="noindent" >defines <span 
class="phvr7t-x-x-80">harry </span>to have the value 17.
<!--l. 152--><p class="indent" >  All functions are curried, that is, they can accept their
arguments in stages. For example:
                                                 <div class="verbatim" id="verbatim-28">
  sandro&#x00A0;=&#x00A0;jim&#x00A0;1 
</div>
<!--l. 157--><p class="nopar" >
<!--l. 159--><p class="noindent" >defines <span 
class="phvr7t-x-x-80">sandro</span>, a function which takes one parameter and
will add 13 to it. This trick becomes very useful with list
processing, see <span 
class="cmsy-10">§</span><a 
href="nipguidese28.html#x39-710006.7">6.7<!--tex4ht:ref: sec:lists --></a>.
<!--l. 163--><p class="indent" >    <span 
class="phvr7t-x-x-80">nip2 </span>has some built-in functions, see Table&#x00A0;<a 
href="#x34-600011">6.1<!--tex4ht:ref: tb:builtin --></a>. They
mostly take a single argument. All other functions are
defined in the various standard toolkits and can be edited in
the program window.
                                                                                       

                                                                                       
<!--l. 168--><p class="indent" >  <a 
 id="x34-600011"></a><hr class="float"><div class="float" 
>
                                           
                                                                                       

                                                                                       
<div class="center" 
>
<!--l. 168--><p class="noindent" >
<div class="tabular"> <table id="TBL-3" class="tabular" 
cellspacing="0" cellpadding="0" rules="groups" 
><colgroup id="TBL-3-1g"><col 
id="TBL-3-1"></colgroup><colgroup id="TBL-3-2g"><col 
id="TBL-3-2"></colgroup><tr 
class="hline"><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-3-1-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-1-1"  
class="td11">Function                           </td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-1-2"  
class="td11">Description                                               </td>
</tr><tr 
class="hline"><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-3-2-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-2-1"  
class="td11"><span 
class="phvr7t-x-x-80">dir </span><span 
class="ptmri7t-">any                                </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-2-2"  
class="td11">List names in scope                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-3-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-3-1"  
class="td11"><span 
class="phvr7t-x-x-80">has</span><span 
class="phvr7t-x-x-80">_member </span><span 
class="ptmri7t-">[char] any     </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-3-2"  
class="td11">Does class have member                          </td>
</tr><tr 
class="hline"><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-3-4-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-4-1"  
class="td11"><span 
class="phvr7t-x-x-80">name2gtype </span><span 
class="ptmri7t-">[char]             </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-4-2"  
class="td11">Search for a GType by name                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-5-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-5-1"  
class="td11"><span 
class="phvr7t-x-x-80">gtype2name </span><span 
class="ptmri7t-">real                 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-5-2"  
class="td11">Return the name of a GType                    </td>
</tr><tr 
class="hline"><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-3-6-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-6-1"  
class="td11"><span 
class="phvr7t-x-x-80">error </span><span 
class="ptmri7t-">[char]                        </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-6-2"  
class="td11">Stop with error message                           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-7-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-7-1"  
class="td11"><span 
class="phvr7t-x-x-80">print </span><span 
class="ptmri7t-">any                             </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-7-2"  
class="td11">Convert to string                                       </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-8-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-8-1"  
class="td11"><span 
class="phvr7t-x-x-80">expand </span><span 
class="ptmri7t-">[char]                    </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-8-2"  
class="td11">Expand environment variables in string   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-9-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-9-1"  
class="td11"><span 
class="phvr7t-x-x-80">search </span><span 
class="ptmri7t-">[char]                     </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-9-2"  
class="td11">Search for a file                                        </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-10-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-10-1"  
class="td11"><span 
class="phvr7t-x-x-80">_ </span><span 
class="ptmri7t-">[char]                             </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-10-2"  
class="td11">Translate string                                         </td>
</tr><tr 
class="hline"><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-3-11-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-11-1"  
class="td11"><span 
class="phvr7t-x-x-80">is</span><span 
class="phvr7t-x-x-80">_image </span><span 
class="ptmri7t-">any                      </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-11-2"  
class="td11">Test for image                                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-12-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-12-1"  
class="td11"><span 
class="phvr7t-x-x-80">is</span><span 
class="phvr7t-x-x-80">_bool </span><span 
class="ptmri7t-">any                         </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-12-2"  
class="td11">Test for boolean                                       </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-13-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-13-1"  
class="td11"><span 
class="phvr7t-x-x-80">is</span><span 
class="phvr7t-x-x-80">_real </span><span 
class="ptmri7t-">any                          </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-13-2"  
class="td11">Test for real                                              </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-14-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-14-1"  
class="td11"><span 
class="phvr7t-x-x-80">is</span><span 
class="phvr7t-x-x-80">_class </span><span 
class="ptmri7t-">any                        </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-14-2"  
class="td11">Test for class                                            </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-15-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-15-1"  
class="td11"><span 
class="phvr7t-x-x-80">is</span><span 
class="phvr7t-x-x-80">_char </span><span 
class="ptmri7t-">any                         </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-15-2"  
class="td11">Test for char                                             </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-16-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-16-1"  
class="td11"><span 
class="phvr7t-x-x-80">is</span><span 
class="phvr7t-x-x-80">_list </span><span 
class="ptmri7t-">any                           </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-16-2"  
class="td11">Test for list                                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-17-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-17-1"  
class="td11"><span 
class="phvr7t-x-x-80">is</span><span 
class="phvr7t-x-x-80">_complex </span><span 
class="ptmri7t-">any                   </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-17-2"  
class="td11">Test for complex                                      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-18-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-18-1"  
class="td11"><span 
class="phvr7t-x-x-80">is</span><span 
class="phvr7t-x-x-80">_instanceof </span><span 
class="ptmri7t-">[char] any     </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-18-2"  
class="td11">Test for instance of class                          </td>
</tr><tr 
class="hline"><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-3-19-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-19-1"  
class="td11"><span 
class="phvr7t-x-x-80">re </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">complex</span>/<span 
class="ptmri7t-">class     </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-19-2"  
class="td11">Extract real part of complex                     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-20-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-20-1"  
class="td11"><span 
class="phvr7t-x-x-80">im </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">complex</span>/<span 
class="ptmri7t-">class    </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-20-2"  
class="td11">Extract imaginary part of complex          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-21-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-21-1"  
class="td11"><span 
class="phvr7t-x-x-80">hd </span><span 
class="ptmri7t-">list                                </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-21-2"  
class="td11">Extract head of list                                   </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-22-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-22-1"  
class="td11"><span 
class="phvr7t-x-x-80">tl </span><span 
class="ptmri7t-">list                                  </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-22-2"  
class="td11">Extract tail of list                                      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-23-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-23-1"  
class="td11"><span 
class="phvr7t-x-x-80">sin </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class     </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-23-2"  
class="td11">Sine                                                          </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-24-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-24-1"  
class="td11"><span 
class="phvr7t-x-x-80">cos </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class    </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-24-2"  
class="td11">Cosine                                                      </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-25-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-25-1"  
class="td11"><span 
class="phvr7t-x-x-80">tan </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class    </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-25-2"  
class="td11">Tangent                                                     </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-26-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-26-1"  
class="td11"><span 
class="phvr7t-x-x-80">asin </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class   </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-26-2"  
class="td11">Arc sine                                                    </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-27-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-27-1"  
class="td11"><span 
class="phvr7t-x-x-80">acos </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class  </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-27-2"  
class="td11">Arc cosine                                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-28-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-28-1"  
class="td11"><span 
class="phvr7t-x-x-80">atan </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class  </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-28-2"  
class="td11">Arc tangent                                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-29-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-29-1"  
class="td11"><span 
class="phvr7t-x-x-80">log </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class    </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-29-2"  
class="td11">Natural log                                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-30-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-30-1"  
class="td11"><span 
class="phvr7t-x-x-80">log10 </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-30-2"  
class="td11">Base 10 log                                               </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-31-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-31-1"  
class="td11"><span 
class="phvr7t-x-x-80">exp </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class    </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-31-2"  
class="td11">e to the power                                           </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-32-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-32-1"  
class="td11"><span 
class="phvr7t-x-x-80">exp10 </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class</span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-32-2"  
class="td11">10 to the power                                         </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-33-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-33-1"  
class="td11"><span 
class="phvr7t-x-x-80">ceil </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class    </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-33-2"  
class="td11">Round up                                                  </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-34-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-34-1"  
class="td11"><span 
class="phvr7t-x-x-80">floor </span><span 
class="ptmri7t-">image</span>/<span 
class="ptmri7t-">number</span>/<span 
class="ptmri7t-">class  </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-34-2"  
class="td11">Round down                                             </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-35-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-35-1"  
class="td11"><span 
class="phvr7t-x-x-80">gammq </span><span 
class="ptmri7t-">real real                 </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-35-2"  
class="td11">Normalised incomplete Gamma function</td>
</tr><tr 
class="hline"><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-3-36-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-36-1"  
class="td11"><span 
class="phvr7t-x-x-80">vips</span><span 
class="phvr7t-x-x-80">_image </span><span 
class="ptmri7t-">[char]              </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-36-2"  
class="td11">Load image from file                                </td>
</tr><tr  
 style="vertical-align:baseline;" id="TBL-3-37-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-37-1"  
class="td11"><span 
class="phvr7t-x-x-80">read </span><span 
class="ptmri7t-">[char]                        </span></td><td  style="white-space:nowrap; text-align:left;" id="TBL-3-37-2"  
class="td11">Load file as a string                                  </td>
</tr><tr 
class="hline"><td><hr></td><td><hr></td></tr><tr  
 style="vertical-align:baseline;" id="TBL-3-38-"><td  style="white-space:nowrap; text-align:left;" id="TBL-3-38-1"  
class="td11">                 </td></tr></table></div></div>
<br /><div class="caption" 
><span class="id">Table&#x00A0;6.1: </span><span  
class="content"><span 
class="phvr7t-x-x-80">nip2 </span>built in functions</span></div><!--tex4ht:label?: x34-600011 -->
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