
## Overview

The **`gmp_rootrem()` function** in PHP is used to find the $n^{th}$ root of a given number. 

## Syntax

```
gmp_rootrem(GMP|int|string $num, int $nth): array
```

## Parameters

- `num`: This is a GMP object, integer, or a string whose nth root has to be calculated.
- `nth`: This is the positive root.

## Return value

This method returns an array of two elements: 

- The first element refers to the integer component of the $n^{th}$ root. 

- The second element refers to the remainder of the $n^{th}$ root.

## Example

<?php
$nthroot1 = gmp_rootrem(64,2);
$nthroot2 = gmp_rootrem(64,5);

print_r("The square root of 64 is:\n\n");
print_r($nthroot1);
echo "-----------------------------------\n";
print_r("The fifth root of 64 is:\n\n");
print_r($nthroot2);
?>


## Explanation

- Line 2: We declare and initialize the variable `$nthroot1` to store the result of the $2^{nd}$ root (also known as the square root) of 64.

- Line 3: We declare and initialize the variable `$nthroot2` to store the result of the $5^{th}$ root of 64.
  
- Line 6: We print the array stored in `$nthroot1`.

- Line 9: We print the array stored in `$nthroot2`.


## Explanation

- Line 2: We declare and initialize the variable `＄nthroot1` to store the result of the $2^{nd}$ root (also known as the square root) of 64.

- Line 3: We declare and initialize the variable `＄nthroot2` to store the result of the $5^{th}$ root of 64.
  
- Line 6: We print the array stored in `＄nthroot1`.

- Line 9: We print the array stored in `＄nthroot2`.

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What is the gmp_rootrem() method in PHP?

The `gmp_rootrem()` function in PHP calculates the nth root and remainder of a given number and returns them in an array.