C++ if-else Statements

C++ if-else Statements control the flow of the program based on conditions. If the expression evaluates to true, it executes certain statements within the if block; Otherwise, it executes statements within the else code block. This tutorial will teach you how to use if-else Statements in C++.

The basic format of if-else Statement is:

Syntax:

if(test_expression)
{
    //execute your code
}
else
{
    //execute your code
}

Figure - Flowchart of if-else Statement:

Example of a C++ program to demonstrate an if-else Statement:

Example:

#include <iostream>
using namespace std;

int main()
{
    int a = 15, b = 20;

    if (b > a) {  
        cout << "b is greater" << endl;
    } else {  
        cout << "a is greater" << endl;
    }  
    system("PAUSE");
}

Program Output:

Example:

#include <iostream>
using namespace std;

int main()
{
    char name;
    int password;

    cout << "Enter the name: "; cin >> name;
    cout << " Enter your password: "; cin >> password;
    if (name == 'GG') {
        if (password == 1346) {
            cout << "Login successful";
        }
        else {
            cout << "Incorrect PASSWORD, Try again.";
        }
    }
    else {
        cout << " Incorrect Login Details, Try again.";
    }
}

Program Output:

Enter the name: GG
Enter your password: 1346
Login successful