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Home  > Language reference > Functions > sqrt

Perl 5 version 24.4 documentation

sqrt

Perl functions A-Z | Perl functions by category | The 'perlfunc' manpage
  • sqrt EXPR

  • sqrt

    Return the positive square root of EXPR. If EXPR is omitted, uses $_ . Works only for non-negative operands unless you've loaded the Math::Complex module.

    1. use Math::Complex;
    2. print sqrt(-4); # prints 2i
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