programming C MOC

While

while loops keep looping until a condition is met or the loop broken:

#include <stdio.h>
 
int main() {
	int n = 10;
	puts("Starting countdown...");
	while (n > 0) {
		printf("%d...", n);
		n--;
		if (n == 2) {
			puts("Aborted!");
			break;
		}
	}
}

break can break the loop and continue starts the next execution of the loop.

For

The for loop has an initialization, a condition, and an increment separated with ;.

#include <stdio.h>
 
int main() {
    puts("Starting countdown...");
    for (int n = 10; n > 0; n--) {
        if (n == 2) {
            puts("Aborted!");
            break;
        }
        if (n % 2 == 0) {
            printf("!... ");
            continue;
        }
        printf("%d... ", n);
    }
    printf("%s", "\n");
 
    return(0);
}

Do

The do loop defines the condition after the code block so that the code is run at least once, regardless of the condition.

#include <stdio.h>
 
int main() {
    int n = 10;
 
    puts("Starting countdown...");
    do {
        if (n == 2) {
            printf("Aborted!");
            break;
        }
        if (n % 2 == 0) {
            n--;
            continue;
        }
        printf("%d... ", n);
        n--;
    } while (n > 0);
    printf("%s", "\n");
 
    return(0);
}