Login Register

sqrt

(PHP 4, PHP 5, PHP 7)

Square root

float sqrt ( float $arg )

Returns the square root of arg.

Parameters:

arg

The argument to process

Returns:

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

Examples:

sqrt() example

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

See also:

Links:

http://php.net/manual/en/function.sqrt.php

doc_php

2025-01-10 15:47:30

Comments

Leave a Comment

Please login to continue.

Popular Articles

sqrt sqrt(a) Class Public methods Computes the square root of a. It makes use of Complex and Rational to have no rounding errors if possible

sqrt Defined in header <math.h> float sqrtf( float arg ); (1) (since C99) double sqrt( double arg ); (2) long double

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 M

sqrt sqrt(z) Class Public methods Returns the non-negative square root of Complex. sqrt(-1) #=> 0+1.0i sqrt(Complex(-1,0)) #=&g

sqrt sqrt(x,prec) Instance Public methods Computes the square root of x to the specified number of digits of precision. BigDecimal.new('2').s