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<h2>Variable Operations</h2>
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The following operations are supported in SLUDGE:
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<P>
<B>A + B</B>
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If both values are numbers, the result is the total of the two numbers. If one value is not a number, the result is a string containing the string representation of the first value followed by the string representation of the second. For example, 1+2 is the number 3, whereas 1+"2" is the string "12".
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<B>A - B</B>
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Both values must be numbers. The result is the first number minus the second.
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<B>A * B</B>
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Both values must be numbers. The result is the first number multiplied by the second.
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<B>A / B</B>
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Both values must be numbers. The result is the first number divided by the second. The second number cannot be 0.
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<B>A % B</B>
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Both values must be numbers. The result is the remainder when the first number is divided by the second (or the modulus). The second number cannot be 0.
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<B>A && B</B>
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Both values are treated as boolean. The result is true if both values are TRUE, otherwise it is FALSE..
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<B>A || B</B>
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Both values are treated as boolean. The result is TRUE if either value is TRUE, otherwise it is FALSE.
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<B>A = B</B>
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Changes the value of A so that it now contains the same data as B. The same value is given as the result, meaning that the code A=B=C=D=E=8 will set all five variables to the numerical value 8.
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<B>A == B</B>
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The result is TRUE if both values are of the same type and if the contents match, otherwise it is FALSE.
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<B>A != B</B>
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The result is FALSE if both values are of the same type and if the contents match, otherwise it is TRUE.
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<B>A > B</B>
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Both values must be numbers. The result is TRUE if the first number is greater than the second, otherwise it is FALSE.
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<B>A < B</B>
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Both values must be numbers. The result is TRUE if the first number is less than the second, otherwise it is FALSE.
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<B>- A</B>
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The value must be a number. The result is 0 minus the original value.
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<B>! A</B>
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The value is treated as boolean. The result is FALSE if the value is TRUE, and TRUE if the value is FALSE.
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<B>A ? B : C</B>
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The first value is treated as boolean. The result is B if the value is TRUE and C if the value is FALSE.
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<B>A ++</B>
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Increases the value of A by 1. A must be a number; if not, the code has no effect. The return value is the old value of A.
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<B>A --</B>
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Decreases the value of A by 1. A must be a number; if not, the code has no effect. The return value is the old value of A.
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<B>A += B</B>
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Adds A to B and stores the result in A. <a href="Problems_with_compound_operators_in_SLUDGE.html">*</a>
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<B>A -= B</B>
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Takes B from A and stores the result in A. <a href="Problems_with_compound_operators_in_SLUDGE.html">*</a>
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<B>A *= B</B>
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Multiplies A and B and stores the result in A. <a href="Problems_with_compound_operators_in_SLUDGE.html">*</a>
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<B>A /= B</B>
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Divides A by B and stores the result in A. <a href="Problems_with_compound_operators_in_SLUDGE.html">*</a>
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<B>A %= B</B>
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Performs the operation A % B and stores the result in A. <a href="Problems_with_compound_operators_in_SLUDGE.html">*</a>
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(For operations in which the value or values must be numbers, the engine will quit with a Fatal Error message box if non-numbers are used.)
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<H3>More on this subject:</H3>
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<a href="Problems_with_compound_operators_in_SLUDGE.html">Problems with +=, -=, *=, /= and %= in SLUDGE</a>
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<H3>See also:</H3>
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<a href="Treating_Variables_as_Booleans.html">Treating Variables as Booleans</a>
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<a href="Treating_Variables_as_Strings.html">Treating Variables as Strings</a>
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<P class="copyright-notice">SLUDGE and this SLUDGE documentation are <A HREF="Copyright.html">copyright</A> Hungry Software and contributors 2000-2012
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