C++ If else statement

The if-else statement in C++ is a control flow structure used to execute code conditionally. It allows you to check a boolean condition (an expression that evaluates to true or false) and execute different blocks of code depending on whether the condition is true or false.

Syntax:

if (condition)
{
    // Code to execute if the condition is true
}
else
{
    // Code to execute if the condition is false
}

Example:

#include <iostream>
using namespace std;

int main() {
    int age = 15;
    // Checking if the person is eligible to vote
    if (age >= 18)
    {
       cout <<"You are eligible to vote."<< endl;
    } else {
       cout <<"You are not eligible to vote."<< endl;
     }
   return 0;
}

Output:

Example: If number is not positive

#include <iostream>
using namespace std;

int main() {
     int number = -20;
    // Checking if the number is positive
    if (number > 0)
    {
        cout <<"Number is positive"<< endl;
    } else {
       cout <<"Number is not positive"<< endl;
     }
   return 0;
}

Explanation:

• Condition: number >= 0 is the condition being checked.
• Since number is less than 0, then condition evaluates to false.

Output: