What is a Loop in C? (for, while, do-while Explained Simply)

When learning C programming, one important concept you will see again and again is loops.

But what exactly is a loop?

Let’s understand it in a very simple way.

What is a Loop?

A loop is used to repeat a block of code multiple times.

Instead of writing the same code again and again, you can use a loop.

👉 Example:
If you want to print numbers from 1 to 5, you don’t need to write 5 print statements. A loop can do it for you.

There are three main types of loops in C:

The for loop is used when you know how many times you want to repeat something.

#include <stdio.h>

int main() {
    for(int i = 1; i <= 5; i++) {
        printf("%d\n", i);
    }
    return 0;
}

👉 This will print numbers from 1 to 5.

The while loop is used when you want to repeat something until a condition is true.

#include <stdio.h>

int main() {
    int i = 1;
    while(i <= 5) {
        printf("%d\n", i);
        i++;
    }
    return 0;
}

The do-while loop runs at least one time, even if the condition is false.

#include <stdio.h>

int main() {
    int i = 1;
    do {
        printf("%d\n", i);
        i++;
    } while(i <= 5);
    return 0;
}

Loops make your code:

If you understand loops well, you will become much better at programming.

JazakAllah for reading!