Loops in C++

What is a loop?

Loops allow you to repeat a block of code multiple times. They are useful when you need to run the same instructions multiple times.

Types of Loops:

• For Loop – Best for a known number of repetitions.
• While Loop – Runs while a condition is true.
• Do-While Loop – Runs at least once, then checks the condition.

Example: For Loop

This prints numbers from 1 to 5:

#include <iostream>
using namespace std;

int main() {
    for (int i = 1; i <= 5; i++) {
        cout << "Number: " << i << endl;
    }
    return 0;
}
            

Example: While Loop

This loop continues while the condition remains true:

#include <iostream>
using namespace std;

int main() {
    int count = 1;
    while (count <= 5) {
        cout << "Count: " << count << endl;
        count++;
    }
    return 0;
}
            

Example: Do-While Loop

This always runs at least once:

#include <iostream>
using namespace std;

int main() {
    int num = 1;
    do {
        cout << "Number: " << num << endl;
        num++;
    } while (num <= 5);
    return 0;
}