Return the positive square root of EXPR. If EXPR is omitted, uses$_. Works only for non-negative operands unless you've loaded theMath::Complex module.
use Math::Complex;print sqrt(-4); # prints 2iPerldoc Browser is maintained by Dan Book (DBOOK). Please contact him via theGitHub issue tracker oremail regarding any issues with the site itself, search, or rendering of documentation.
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