sqrt

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.

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

Links:

http://perldoc.perl.org/5.24.0/functions/sqrt.html

doc_perl

2016-12-06 03:27:16

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