sqrt

    (PHP 4, PHP 5, PHP 7, PHP 8)

    sqrt — Square root

    Description

    sqrt(float $num): float

    Returns the square root of num.

    Parameters

    num

    The argument to process

    Return Values

    The square root of num or the special value NAN for negative numbers.

    Examples

    Example #1 sqrt() example

    <?php
    / Precision depends on your precision directive
    echo sqrt(9); / 3
    echo sqrt(10); / 3.16227766 ...
    ?>

    See Also

    Found A Problem?

    Learn How To Improve This Page • Submit a Pull Request • Report a Bug
    ＋add a note

    User Contributed Notes

    There are no user contributed notes for this page.
    To Top

    Follow Lee on X/Twitter - Father, Husband, Serial builder creating AI, crypto, games & web tools. We are friends :) AI Will Come To Life!

    Check out: eBank.nz (Art Generator) | Netwrck.com (AI Tools) | Text-Generator.io (AI API) | BitBank.nz (Crypto AI) | ReadingTime (Kids Reading) | RewordGame | BigMultiplayerChess | WebFiddle | How.nz | Helix AI Assistant