C++ if Statement(How if statement Work)

C++ if Statement

if (testExpression) 
{
   // statements
}

How if statement works?




Flowchart of if Statement




Example 1: C++ if Statement

// Program to print positive number entered by the user
// If user enters negative number, it is skipped
 
#include <iostream>
using namespace std;

int main() 
{
    int number;
    cout << "Enter an integer: ";
    cin >> number;

    // checks if the number is positive
    if ( number > 0) 
    {
        cout << "You entered a positive integer: " << number << endl;
    }

    cout << "This statement is always executed.";
    return 0;

}



Output 1
Enter an integer: 5
You entered a positive number: 5
This statement is always executed.

Output 2
Enter a number: -5
This statement is always executed.