fabs, fabsl

raw OCR

Returns the absolute value of a floating-point number.

Defined in header <math.h>

Syntax

#include <math.h>
double fabs(double x);
long double fabsKlong double j);

Portability

	DOS	UNIX	Windows	ANSI C	C++ only
fobs	■	■	■	■
	■		■

Remarks

tabs calculates the absolute value of x, a double, fabsl is the long double version; it takes a long double argument and returns a long double result.

Return value

tabs and fabsl return the absolute value of x.

Example

#include <stdio.h>
#include <math.h>
int main(void)
{
float number = -1234.0;
printf("number: %f  absolute value:  %f\n", number, fabs(number));
return 0;

Differences from modern implementations

Nothing recorded yet.

Modern references

cppreference (search)
POSIX (search)
Microsoft C runtime (search)

These are search links, not yet checked by hand.

Extraction notes

heading `fobs, fabsl` read as `fabs, fabsl`

Stable link: /3.1/math.h/fabs/ · short form /3.1/fabs/