fabs c c++
The "fabs" function in C++ is used to calculate the absolute value of a floating-point number. It takes a single argument, which is the number whose absolute value needs to be calculated. The return value is the absolute value of the input number.
Here is an example usage:
#include <iostream>
#include <cmath>
int main() {
double x = -10.5;
double result = fabs(x);
std::cout << "The absolute value of " << x << " is " << result << std::endl;
return 0;
}
In this example, we include the <cmath>
header file, which contains the declaration of the fabs
function. We then declare a variable x
and assign it a value of -10.5. We call the fabs
function with x
as the argument, and store the result in the variable result
. Finally, we print the result using std::cout
.
The output of this program will be:
The absolute value of -10.5 is 10.5
This demonstrates how the fabs
function can be used to calculate the absolute value of a floating-point number in C++.