? while Loop in C

The while loop in C is used to repeat a block of code as long as a given condition is true.

? Syntax

c
#include <stdio.h>int main() {    int i = 1;    while (i <= 5) {        printf("%d\n", i);        i++;    }    return 0;}

? Output:

12345

? Infinite while Loop

c
while (1) {    // runs forever unless you use break}

Use with caution!

?? Common Mistakes

• Forgetting to update the loop variable (i++) ? causes an infinite loop

• Using = instead of == in the condition

? Use Cases

• When you don't know how many times to loop ahead of time

• Waiting for user input or events