abs in c++
The abs()
function in C++ is used to calculate the absolute value of a given number. It returns the absolute value of the argument passed to it.
Here is the syntax of the abs()
function:
int abs(int n);
The abs()
function takes a single argument of type int
and returns an int
value representing the absolute value of the given number.
Note: The abs()
function is part of the <cmath>
library, so you need to include this header file at the beginning of your program in order to use the abs()
function.
Example Usage:
#include <iostream>
#include <cmath>
int main() {
int num = -5;
int absNum = abs(num);
std::cout << "Absolute value of " << num << " is " << absNum << std::endl;
return 0;
}
In this example, we include the necessary headers <iostream>
and <cmath>
. We declare an integer variable num
and assign it a value of -5. We then use the abs()
function to calculate the absolute value of num
and store the result in the absNum
variable. Finally, we print the result using std::cout
.
The output of this program will be:
Absolute value of -5 is 5
This demonstrates how the abs()
function can be used to calculate the absolute value of a number in C++.