function
fabs
<cmath>
double fabs ( double x );
float fabs ( float x );
long double fabs ( long double x );
Compute absolute value
Returns the absolute value of
x (
/x/ ).
In C++,
abs is also declared in this header with the same behavior.
Parameters
- x
- Floating point value.
Return Value
The absolute value of
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
|
/* fabs example */
#include <stdio.h>
#include <math.h>
int main ()
{
printf ("The absolute value of 3.1416 is %lf\n", fabs (3.1416) );
printf ("The absolute value of -10.6 is %lf\n", fabs (-10.6) );
return 0;
}
|
Output:
The absolute value of 3.1416 is 3.141600
The absolute value of -10.6 is 10.600000
|
See also
- abs
- Absolute value (function
)
- labs
- Absolute value (function
)
- floor
- Round down value (function)
- ceil
- Round up value (function)
- modf
- Break into fractional and integral parts (function)