roundl Function

Returns the argument rounded to an integer value.

Include

<math.h>

Prototype

long double roundl(long double x);

Argument

x

the value to round

Return Value

Returns the value of x rounded to the nearest integer value, always rounding midway cases away from zero. The rounded integer is returned as a floating-point value.

Example

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

int main(void)
{
  long double x, y;

  x = 10.103;
  y = roundl(x);
  printf("The nearest integer value to %Lf is %Lf\n", x, y);

  x = 10.5;
  y = roundl(x);
  printf("The nearest integer value to %Lf is %Lf\n", x, y);
}

Example Output

The nearest integer value to 10.103000 is 10.000000
The nearest integer value to 10.500000 is 11.000000