Introduction To C++ Programming - Part 3.

Problem: A Simple Program To Find The Absolute Value Of An Integer.

Method 1: 

#include <iostream>

using namespace std;

int main() {

int number;

int abs_number;

cout << "Enter an integer (positive or negative): " << endl;

cin >> number;

// Find the absolute value

if(number >= 0) {

abs_number = number;

}

else

abs_number = -number;

// Print out output

cout << "The absolute value of " << number << " is " << abs_number;

cout << endl;

return 0;

}

Output:

Enter an integer (positive or negative): -11

The absolute value of -11 is 11

Method 2: Using A Function

#include <iostream>

using namespace std;

int Abs(int i)

{

if( i >= 0)

return i;

else

return -i;

}

int main() {

int number;

int abs_number;

cout << "Enter an integer (positive or negative): " << endl;

cin >> number;

// calling the function Abs()

abs_number = Abs(number);

cout << "The absolute value of " << number << " is " << abs_number;

cout << endl;

return 0;

}

Output:

Enter an integer (positive or negative): -17

The absolute value of -17 is 17