# CPP If Else

CPP If Else statement is a conditional statement, which can be used in various forms to check a condition or multiple conditions and to perform the specified action or actions, if the particular condition is true. These are:

• if :

If statement is used to perform an action if a single condition is true.

### Syntax:

if (condition)

{

Execute this code if condition is true; else nothing to be executed;

}

• ..else:

If else statement is used to perform an action if a single condition is true and to perform another action if that condition is false.

### Syntax:

if (condition)

{

Execute this code if condition is true;

}

else

{

Execute this code if condition is false;

}

• ..else if….else:

If elseif else statement is used to perform different actions for different conditions.

### Syntax:

if (condition)

{

Execute this code if this condition is true;

}

else if (condition)

{

Execute this code if this condition is true;

}

else

{

Execute this code if all the conditions are false;

}

Example 1: Example of if statement

#include <iostream> using namespace std; int main() { int age; cout << "Enter your age: "; cin >> age; if (age < 18) cout << "You are not eligible to vote!"; return 0; }

Output

Enter your age: 17 You are not eligible to vote!

Example 2: Example of if..else statement

#include <iostream> using namespace std; int main() { int age; cout << "Enter your age: "; cin >> age; if (age < 18) cout << "You are not eligible to vote!"; else cout << "You are eligible to vote!"; return 0; }

Output

You are eligible to vote!

Example 3: Example of if..else if..else statement

#include <iostream> using namespace std; int main() { int age; cout << "Enter your age: "; cin >> age; if (age < 18) cout << "You are not eligible to vote!"; else if (age = 18) cout << "Welcome new voter!"; else cout << "You are eligible to vote!"; return 0; }

Output

Welcome new voter!