Control Instructions - General Questions

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int i = 10;
    do {
        printf("%d ", i);
    } while (i < 5);
    printf("\n");
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int x = 3;
    switch (x) {
        case 1: printf("one ");
        case 3: printf("three ");
        case 4: printf("four ");
        default: printf("other");
    }
    printf("\n");
    return 0;
}

What does for (;;) create?

What will be the output of the program?

#include <stdio.h>

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

What will be the output of the program?

#include <stdio.h>

int main(void) {
    int n = 1234, r = 0;
    while (n) { r = r * 10 + n % 10; n /= 10; }
    printf("%d\n", r);
    return 0;
}