Perl ABC

1. Perl
›
2. builtin functions
›
3. here

sqrt function - find the positive square root

You can use the sqrt function to find the positive square root. The square root is a number that becomes the original number when squared, and has positive and negative values. (Example:The square root of 4 is 2 and -2)

If you want a negative square root, just change the sign of the sqrt result.

my $root_num = sqrt $num;

Example

This is an example to find the positive square root using the sqrt function.

use strict;
use warnings;

# Find the positive square root
my $num = 16;
my $root_num = sqrt $num;

If you want to know more about numerical calculations in Perl, please refer to the following articles.

• Handling of numbers in Perl