  # Arithmetic self-operators

Arithmetic self-operators
These operators work only on numeric operands.
The syntax is:

<target> += <right_operand>
<target> -= <right_operand>
<target> *= <right_operand>
<target> /= <right_operand>
<target> %= <right_operand>

<target> must be an existing variable and contain a numeric value. <right_operand> must evaluate to a numeric value. Note that if you want <right_operand> to be a result of an expression, you must enclose it in the \$(*) expression evaluation call.
Operator += sums the <right_operand> value to the <target> value and stores the result in <target>.
Operator -= subtracts <right_operand> from <target> and stores the result in <target>.
Operator *= multiplies <target> by <right_operand> and stores the result in <target>.
Operator /= divides <target> by <right_operand> and stores the result in <target>.
Operator %= computes <target> modulus <right_operand> and stores the result in <target>.
The division and modulus operators fail with an error if <right_operand> is 0.
If both <target> and <right_operand> are integer values then the results of the division and modulus are integers (truncated for the division).
If <target> or <right_operand> or both are floating point values then the result is a floating point value.
Examples

 ``````    %a=10     echo %a     %a+=20     echo %a     %a-=\$(%a - 1)     echo %a     %a *= 10     echo %a     %a /= 21     echo %a     %a *= 20     echo %a     %a /= 21.0     echo %a     %b = 10.0     %a %= %b     echo %a     %a = 10     %b = 3     # nice trick     %a /= %b.0     echo %a See also operators Index, Language Overview KVIrc 3.9.99 DocumentationGenerated by root at Wed Oct 17 19:34:06 2007 ``````