Rexx Programming/How to Rexx/arithmetic

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The rexx scripting language provides a set of arithmetic operators for manipulating integer and floating point numbers.

Operator   Description
+       addition
-       subtraction
*       multiplication
/       division
%       integerdivision
//      modulus
**      exponent
say 6 + 3       /* addition */
say 8 - 3       /* subtraction */
say 6 * 3       /* multiplication */
say 11 / 4      /* division */
say 11 % 4      /* integer division */
say 11 // 4     /* modulus */
say 5 ** 3      /* exponent */


Arithmetic operators may behave differently than they do in other programming languages[edit]

Note that rexx uses unconventional arithmetic operators, which may have a different meaning to conventional operators used in other programming languages. For example the percent sign is used for integer division in rexx, whereas it is used as a modulus operator in perl.

Arithmetic operations should only be applied to valid numeric values[edit]

The rexx scripting language uses typeless variables that are treated as strings. Arithmetic operators should only be used on strings containing numeric values, otherwise an error may occur.