loops in c (for loop,while loop,do while loop and nested loop)

loops are used to execute a block of code repeatedly based on a condition. There are three main types:

for loop – repeats a block a known number of times.

while loop – repeats as long as a condition is true.

do-while loop – executes the block at least once, then repeats while the condition is true.

1. Looping in c

18. Nested for loop
#include <stdio.h>
intmain() {
inti, j;
for (i= 1; i<= 5; i++) {
for (j = 1; j <= i; j++) {
printf("* ");
}
printf("\n");
}
return 0;
}
*
* *
* * *
* * * *
* * * * *