Print a Equilateral Triangle of length n using C?

Question

Input:
arr = {'a', 'b'}, length = 3

Output:
aaa
aab
aba
abb
baa
bab
bba
bbb

Answer 1

/* C program to print Equilateral Triangle*/

#include<stdio.h>
main()
{
      int i,j,k,n;

      printf("Enter number of rows  of the triangle \n");
      scanf("%d",&n);

      for(i=1;i<=n;i++)
      {
              for(j=1;j<=n-i;j++)
              {
                      printf(" ");
              }
              for(k=1;k<=(2*i)-1;k++)
              {
                      printf("*");
              }
              printf("\n");
      }
      getch();
}

Answer 2

#include<stdio.h>
#include<stdlib.h>
int main()
{
      int i,j,k,n;
      printf("Enter the number of rows of the triangle \n");
      scanf("%d",&n);

      for(i=1;i<=n;i++)
      {
              for(j=1;j<=n-i;j++)
              {
                      printf(" ");
              }
              for(k=1;k<=(2*i)-1;k++)
              {
                      printf("*");
              }
              printf("\n");
      }
      getch();
}