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PHP | gmp_mul() Function

Last Updated : 14 Jun, 2018
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The gmp_mul() function in PHP is an inbuilt function which is used to multiply two GMP numbers (GNU Multiple Precision: For large numbers). Syntax:
GMP gmp_mul ( GMP $num1, GMP $num2 )
Parameters: This function accepts two GMP numbers. It is mandatory parameters as shown in the above syntax. These can be a GMP object in PHP version 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number. This function multiplies these two numbers and returns it. Return Value: This function returns a GMP number which is multiplication of the two numbers passed as parameter. Examples:
Input : num1 = "123456789"
        num2 = "987654321"
Output: 121932631112635269

Input : num1 = "9999999"
        num2 = "99999"
Output: 999989900001
Below programs illustrate the gmp_mul() function in PHP: Program 1: php
<?php
$mul = gmp_mul("562817", "713645");
echo gmp_strval($mul);
?>
Output:
401651537965
Program 2: php
<?php
$mul = gmp_mul("123456789", "987654321");
echo gmp_strval($mul); 
?>
Output: Related Articles:
121932631112635269
Reference: http://php.net/manual/en/function.gmp-mul.php

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