do...while loop C

Explanation of the do...while loop in C

A do...while loop is a control flow statement in C that allows a block of code to be executed repeatedly until a certain condition is met. The key difference between a do...while loop and other loop structures like the while loop is that the do...while loop guarantees that the code block is executed at least once, even if the condition is initially false.

The syntax of a do...while loop in C is as follows:

do {
    // code block to be executed
} while (condition);

Here is an explanation of each step involved in the execution of a do...while loop:

The code block within the do...while loop is executed first, regardless of the condition.
After the code block is executed, the condition is evaluated.
If the condition is true, the code block is executed again. If the condition is false, the loop is terminated, and the program continues with the next statement after the loop.

It is important to note that the condition is checked after the code block is executed, which means that the code block will always be executed at least once, even if the condition is initially false.

Here is an example to illustrate the usage of a do...while loop:

#include <stdio.h>

int main() {
    int i = 1;

    do {
        printf("%d\n", i);
        i++;
    } while (i <= 5);

    return 0;
}

In this example, the code block within the do...while loop will be executed five times because the condition i <= 5 is true. The output will be:

Even if the condition is false initially, the code block will still be executed once. For example, if we change the initial value of i to 10, the output will be:

This is because the condition i <= 5 is false, but the code block is still executed once before the condition is checked.