07. Loops

for, while, counting patterns, live practice

Goals:

for loop
while loop
Loop variable update

1. for loop

Jab pata ho kitni baar chalana hai: for (start; condition; update)

Example: 1 se 5 tak print — counter i badhte raho jab tak i <= 5.

Live practice 1 — Count 1 to 5

Loop limit badal kar 1 se 10 try karo.

#include <cstdio>

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

2. while loop

Jab tak condition true hai, body repeat. Update bhoolna = infinite loop risk.

Live practice 2 — Countdown

Countdown samjho — dry run: n=3,2,1.

#include <cstdio>

int main() {
    int n = 3;
    while (n > 0) {
        printf("Go %d\n", n);
        n = n - 1;
    }
    printf("Done!\n");
    return 0;
}

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