function
floor
<cmath>
double floor ( double x );
float floor ( float x );
long double floor ( long double x );
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
1 2 3 4 5 6 7 8 9 10 11 12
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/* 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)