double floor ( double x );
float floor ( float x );
long double floor ( long double x ); |
<cmath> |
Round down value
Returns the largest integral value that is not greater than x.
Parameters
- x
- Floating point value.
Return Value
The largest integral value not greater than
x.
Portability
In C, only the
double version of this function exists with this name.
Example
/* floor example */
#include <stdio.h>
#include <math.h>
int main ()
{
printf ("floor of 2.3 is %.1lf\n", floor (2.3) );
printf ("floor of 3.8 is %.1lf\n", floor (3.8) );
printf ("floor of -2.3 is %.1lf\n", floor (-2.3) );
printf ("floor of -3.8 is %.1lf\n", floor (-3.8) );
return 0;
} |
Output:
floor of 2.3 is 2.0
floor of 3.8 is 3.0
floor of -2.3 is -3.0
floor of -3.8 is -4.0
|
See also
| ceil | Round up value (function) |
| fabs | Compute absolute value (function) |
| modf | Break into fractional and integral parts (function) |
