This function returns the square root of EXPR, or $_ if omitted. Most of the time, this function returns a floating point number.
Following is the simple syntax for this function −
sqrt EXPR sqrt
This function returns the Floating point number.
Following is the example code showing its basic usage −
#!/usr/bin/perl -w $result = sqrt(4); print " sqrt(4) is $result\n";
When above code is executed, it produces the following result −
sqrt(4) is 2