Program 50:Symbol Pattern 3

Program 50:
 

#include<stdio.h>
main()
{
    int i,j,num;
    printf("Enter number of rows\n");
    scanf("%d",&num);
    for(i=num;i>=1;i--)
    {
    
        for(j=i;j>=1;j--)
        {
            printf("*");
           
        }
        
    printf("\n");
    }
}

Explanation:

1. The program starts with initializing
   • num → To store number of rows
   • i ,j→ Temporary variable

2. printf("Enter number of rows\n");
    scanf("%d",&num);

   Taking number of rows from user.
3. Main Logic goes here:

   for(i=num;i>=1;i--)
       {
       
           for(j=i;j>=1;j--)
           {
               printf("*");
              
           }
           
       printf("\n");
       }

4. Lets take number of rows be 3.So num=3
   
   • Iteration 1 of First Loop:i=num→i=3 and i>=1 which is true so 1st Loop execute
     • Iteration 1 of 2nd Loop:j=i→j=3 and j>=1 which is true so iteration continues
       • And prints '*' in 1st row and 1st coumn
       • Now j  will be decremented by 1
       • So now j=2
     • Iteration 2 of 2nd Loop:j=2 and j>=1  which is true so iteration continues
       • And prints '*' in 1st row and 2nd coumn
       • Now j  will be decremented by 1
       • So now j=1
     • Iteration 3 of 2nd Loop:j=1 and j>=1 which is true so iteration continues
       • And prints '*' in 1st row and 3rd coumn
       • Now j  will be decremented by 1
       • So now j=0
     • Iteration 4 of 2nd Loop:j=0 and j>=1 which is false so 2nd loop terminates
     • So till now 1st row is printed
       
   • Iteration 2 of First Loop:i=2 and i>=1 which is true so 1st Loop execute
     • Iteration 1 of 2nd Loop:j=i→j=2 and j>=1 which is true so iteration continues
       • And prints '*' in 2nd row and 1st coumn
       • Now j  will be decremented by 1
       • So now j=1
     • Iteration 2 of 2nd Loop:j=1 and j>=1  which is true so iteration continues
       • And prints '*' in 2nd row and 2nd coumn
       • Now j  will be decremented by 1
       • So now j=0
     • Iteration 3 of 2nd Loop:j=0 and j>=1 which is false so 2nd loop terminates
     • So till now 1st row and 2nd row are printed
       
   • Iteration 3 of First Loop:i=1 and i>=1 which is true so 1st Loop execute
     • Iteration 1 of 2nd Loop:j=i→j=1 and j>=1 which is true so iteration continues
       • And prints '*' in 3rd row and 1st coumn
       • Now j  will be decremented by 1
       • So now j=0
     • Iteration 2 of 2nd Loop:j=0 and j>=1 which is false so 2nd loop terminates
     • So all the 3 rows are printed
   • Iteration 4 of First loop:i=0 and i>=1 is false so First Loop also terminates
     

 Output: