Nested Loop

When a loop resides inside of other loop .Nested loops are useful while if there is a need of looping for each count of other turn of a loop.

Syntax : 

When we learn C language then we print many types of pattern using nested loop. as follows

• Handling Matrix/2-D Array input/output
• Processing Range of similar Data like array
• Printing Series
• Structure operation

Now I am going to print following pattern using all three types of loop.

While loop example

     int i,j;

     i=1;

     while(i<=5)

     {

          j=1;

          while(j<=i)

          {

              printf("*");

              j++;

          }

          printf("\n");

          i++;

     }

For loop example

    for(i=1;i<=5;i++)

     {

          for(j=1;j<=i;j++)

              printf("*");

          printf("\n");

     }

Do-while loop

     i=1;

     do

     {

          j=1;

          do

          {

              printf("*");

              j++;

          }while(j<=i);

          printf("\n");

     }while(j<=5);

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