The way if statements can be nested, similarly whiles and for can also be nested. To understand how nested loops work, look at the program given below:
#include<stdio.h>
void main()
{
int i = 1;
int j = 1;
do{
do{
printf("Welcome ");
j++;
}while(j<=3);
printf("\n");
j = 1;
i++;
}while(i<=3);
}
Welcome Welcome Welcome
Welcome Welcome Welcome
Welcome Welcome Welcome
Press any key to continue . . .
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.