The **`fmod` function** calculates the remainder of the division of two numbers. Include the `math.h` header file to use it.

`fmod` is used when the argument has an `int` type or a `double` type.

# Prototype
```c
double fmod(double x, double y)
```
# Parameter and return values

## Parameters
- `x`: The numerator in the division (dividend)
- `y`: The denominator in the division (divisor)

## Return value
- The remainder of `x`/`y` in floating-point representation.
It is equivalent to `x - n*y`, where `n` is equal to the quotient of `x`/`y`.

>The sign of the return value is the same as the sign of `x`.

# Special cases

`fmod(0, y)`

`fmod(x, y)`

`fmod(x, ∞)`

Return value: `0`, if `y` is nonzero

Return value: `NaN`, if either `y` is `0` or `x` is `∞`.

Return value:
`x`, if x is not `∞`.


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

int main() {
  double x, y, result;
  x = 2.34;
  y = 1.5;

  result = fmod(x, y);
  printf("The remainder of %lf / %lf = %lf", x, y, result); //%lf is the string formatting placeholder for long float
  return 0;
}

In the example above, both parameters have acceptable values and the output produced is the remainder of their division.

cpp.tar.gz

What is fmod in C?

Calculates the remainder of division of two floating-point numbers. Include math.h header and use fmod(double x, double y).

What is fmod in C?

Prototype

Parameter and return values

Parameters

Return value

Special cases

Code