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Integer Arithmetic

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Integer Arithmetic

By default Perl assumes that it must do most of its arithmetic in floating point. But by saying

    use integer;

you may tell the compiler that it's okay to use integer operations from here to the end of the enclosing BLOCK. An inner BLOCK may countermand this by saying

    no integer;

which lasts until the end of that BLOCK.

The bitwise operators (``&'', ``|'', ``^'', ``~'', ``<<``, and ''>>``) always produce integral results. However, use integer still has meaning for them. By default, their results are interpreted as unsigned integers. However, if use integer is in effect, their results are interpreted as signed integers. For example, ~0 usually evaluates to a large integral value. However, use integer; ~0 is -1.

Source: Perl operators and precedence
Copyright: Larry Wall, et al.
Next: Floating-point Arithmetic

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