<h2>Overview</h2>

The **`fmodl()`** function in C performs the division operation of two input arguments. In mathematical notation, `fmodl()` performs the function of $\frac{x}{y}$. The `fmodl()` function in C is defined in the `<math.h>` header file.

To use the `fmodl()` function, you must include the `<math.h>` library at the beginning of your code as shown below:

```C
#include<math.h>
```

The `fmodl()` function is defined as below in the `<math.h>` header file:


```C
long double fmodl( long double x, long double y );
```

<h2>Parameters</h2>

The `fmodl()` function takes two arguments ($x$ and $y$) of type `long double` as input.

<h2>Return value</h2>

The `fmodl()` function returns the remainder if $y$ divides $x$. The return value is of type `long double`.

Different values of $x$ and $y$ can result in varying results and errors:

1. If $x=0$ but $y$ does not, the return value will be $0$.
2. If $x$ is $\infty$ and $y$ is a legitimate number, the return value will be `Not a Number (NaN)`.
3. If $y$ is $\infty$ and $x$ is a legitimate number, the return value will be `NaN`.
4. If either $x$ or $y$ is `NaN`, the return value will also be `NaN`.

<h2>Example</h2>

Below is an example of how you can use `fmodl()`:



#include<stdio.h>
#include<math.h>

int main() {

    printf("4.2/2 = %Lf\n", fmodl(4.2,2));
    return 0;
}

gcc compiler

<h2>Explanation</h2>

The `fmodl()` function has been given the arguments such that $x=4.2$ and $y=2$. The function divides $\frac{4.2}{2}$ and returns the result of this division. 

What is fmodl in C?

Overview

Parameters

Return value

Example

Explanation