# C <math.h> - remquo() Function

The C <math.h> remquo() function returns the floating-point remainder of x/y (rounded to nearest integer). The function additionally stores the quotient internally which used to determine the result. This can be mathematically expressed as below:

fmod = x - q * y

Where q is the result of x/y rounded towards nearest integer (with halfway cases rounded toward the even number).

Note: The remainder function is similar to the remquo function except the does not stores quotient internally.

### Syntax

```double remquo (double x, double y, int* q);
float remquof (float x, float y, int* q);
long double remquol (long double x, long double y, int* q);
```

### Parameters

 `x` Specify the value of numerator. `y` Specify the value of denominator. `q` Specify the pointer to the quotient calculated internally and used to determine the remainder.

### Return Value

Returns remainder of x/y. If the remainder is zero, its sign will be same as that of x and value stored in q will be unspecified. If y is zero, the function may either return zero or cause a domain error (depending on the library implementation).

### Example:

In the example below, remquo() function is used to find out the remainder of a given division.

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

int main (){
double x, y;
int q;
x = 23;
y = 4;

double result = remquo(x, y, &q);

printf("numerator = %lf\n", x);
printf("denominator = %lf\n", y);
printf("remainder = %lf\n", result);
printf("quotient = %i\n", q);

return 0;
}
```

The output of the above code will be:

```numerator = 23.000000
denominator = 4.000000
remainder = -1.000000
quotient = 6
```

❮ C <math.h> Library

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