PHP | gmp_sqrt() Function

The gmp_sqrt() is a built-in function in PHP which is used to calculate the square root of a GMP number (GNU Multiple Precision : For large numbers). This function returns only the integral part of the square root of the GMP number. Syntax:

gmp_sqrt ( $num )

Parameters: This function accepts a GMP number $num as a mandatory parameter as shown in the above syntax. This parameter can be a GMP object in PHP version 5.6 and later, or we are also allowed to pass a numeric string provided that it is possible to convert that string to a number. Return Value: This function returns a GMP number which is the square root of a GMP number passed to it as parameter. This function only returns the integral part of the square root of the GMP number passed to it as argument. Examples:

 Input : "9" Output : 3 Input : "24" Output : 4 

Below programs illustrate the gmp_sqrt() function in PHP : Program 1: Program to calculate the square root of a GMP number when numeric strings as GMP numbers are passed as arguments. php

<?php // PHP program to calculate the square root  // of a GMP number passed as arguments  // strings as GMP numbers  $num1 = "9"; $num2 = "24"; // calculates the square root of a GMP number $squareRoot = gmp_sqrt($num1); echo $squareRoot."\n"; // calculates the square root of a GMP number $squareRoot = gmp_sqrt($num2); echo $squareRoot."\n"; ?> 

Output:

 3 4 

Program 2: Program to calculate the square root of a GMP number when GMP numbers are passed as arguments. php

<?php // PHP program to calculate the square root  // of a GMP number // creating GMP numbers using gmp_init() $num1 = gmp_init(9, 10); $num2 = gmp_init(24, 10); // calculates the square root of a GMP number $squareRoot = gmp_sqrt($num1); echo $squareRoot."\n"; // calculates the square root of a GMP number $squareRoot = gmp_sqrt($num2); echo $squareRoot."\n"; ?> 

Output:

 3 4 

Reference: http://php.net/manual/en/function.gmp-sqrt.php