Program 34:To Print Floyds Triangle Pattern

Program 34:
 

#include<stdio.h>
main()
{
int rows,i,j,k=1;
printf("Enter number of rows to get Floyds triangle\n");
scanf("%d",&rows);
for(i=1;i<=rows;i++)
{
for(j=1;j<=i;j++)
{
printf("%d ",k);
k++;
}
printf("\n");
}

}

Explanation:

1. The program starts with initializing
   • rows → Taken from user to print those many rows
   • i,j,k → used as variables.

2. printf("Enter number of rows to get Floyds triangle\n");
   scanf("%d",&rows);

   Input Taken from user.From out lets take rows=7.

3. for(i=1;i<=rows;i++)
   {

   This forloop executes rows number of times which means if rows=7 the statements under this for loop will execute 7 times

4. for(i=1;i<=rows;i++)
   {
      for(j=1;j<=i;j++)
       {
          printf("%d ",k);
          k++;
        }
       printf("\n");
   }

   Let us start Compilation:
   • Iteration 1 of outer forloop: i=1 & i<=7 → true so loop executes
     • Iteration 1 of inner forloop: j=1& 1<=1 → true so loop executes
       • Now it prints value of k which is already initialized to 1
       • Now k is incremented by 1.So k=2.
     • Iteration 2 of inner forloop: j=2& 2<=1 → flase so loop terminates
     • The printed values in this iteration are 1
     • The final values after 1st iteration are i=2,k=2.
     • Then the printf("\n") causes the next iteration to start in new row.
   • Iteration 2 of outer forloop: i=2 & 2<=7 → true so loop executes in new row
     • Iteration 1 of inner forloop: j=1& 1<=2 → true so loop executes
       • Now it prints value of k which is 2
       • Now k is incremented by 1.So k=3
     • Iteration 2 of inner forloop: j=2& 2<=2 → true so loop executes
       • Now it prints value of k which is 3
       • Now k is incremented by 1.So k=4
       • The printed values in this iteration are 2,3
       • The final values after 2nd iteration are i=3,k=4.
       • Then the printf("\n") causes the next iteration to start in new row.
     • Iteration 3 of inner forloop: j=3& 3<=2 → flase so loop terminates
   • In this way the loop goes on until i becomes 7.

 Output: