C Programming Tutorial
C Programming allows us to perform mathematical operations through the functions defined in
C Math Functions
In the C Programming Language, the fabs function returns the absolute value of a floating-point number.
Syntax
The syntax for the fabs function in the C Language is:
double fabs(double x);
Parameters or Arguments
The value to convert to an absolute value.
Returns
The fabs function returns the absolute value of a floating-point number represented by x.
Required Header
In the C Language, the required header for the fabs function is:
#include <math.h>
Applies To
In the C Language, the fabs function can be used in the following versions:
- ANSI/ISO 9899-1990
fabs Example
/* Example using fabs by c programming */ #include <stdio.h> #include <math.h> int main(int argc, const char * argv[]) { /* Define temporary variables */ double value; double result; /* Assign the value we will find the fabs of */ value = -2.1; /* Calculate the absolute value of value */ result = fabs(value); /* Display the result of the calculation */ printf("The Absolute Value of %f is %f\n", value, result); return 0; }
When compiled and run, this application will output:
The Absolute Value of -2.100000 is 2.100000