C Programme to print the triangle.

            a  b  c  d  e

              a  b  c  d

                a  b  c

                  a  b

                    a

#include<stdio.h>

#include<conio.h>

int main()

{

            int i,n,j,k;

            clrscr();

            printf("Enter  the number : ");

            scanf("%d",&n);

            printf("\n");

            for(i=0;i<n;i++)

            {

                        for(k=1;k<=i;k++)

                        {

                                    printf(" ");

                        }

                        for(j=1;j<=n-i;j++)

                        {

                                    printf(" %c",96+j);

                        }

                        printf("\n");

            }

            getch();

return 0;

}                                                                                                                    

Output:

Enter  the number : 5

 a  b  c  d  e

   a  b  c  d

    a  b  c

      a  b

        a