The labs() function can be thought as the long int version of abs().
It is defined in <cstdlib> header file.
[Mathematics] |x| = labs(x) [C++ Programming]
labs() prototype [As of C++ 11 standard]
long labs(long x); long int labs(long int x);
The labs() function takes a single argument of type long or long int and returns a value of same type.
labs() Parameters
x: A long or long int data whose absolute value is returned.
labs() Return value
The labs() function returns the absolute value of x i.e. |x|.
Example: How labs() function works in C++?
#include <iostream>
#include <cstdlib>
using namespace std;
int main()
{
long int x,y;
x = -9999999L;
y = 10000000L;
cout << "labs(" << x << ") = |" << x << "| = " << labs(x) << endl;
cout << "labs(" << y << ") = |" << y << "| = " << labs(y) << endl;
return 0;
}
When you run the program, the output will be:
labs(-9999999) = |-9999999| = 9999999 labs(10000000) = |10000000| = 10000000