Equilateral Triangle Printing In C

 Equilateral Triangle Printing In C

A triangle with all sides equal is called equilateral triangle. We shall now see how to print stars *, in an equilateral triangle shape.

In geometry, an equilateral triangle is a triangle in which all three sides are equal. In the familiar Euclidean geometry, equilateral triangles are also equiangular; that is, all three internal angles are also congruent to each other and are each 60°. They are regular polygons and can therefore also be referred to as regular triangles.

Algorithm should like this:

Step 1 - Take number of rows to be printed, n.

Step 2 - Make an iteration for n times

Step 3 - Print " " (space) for in decreasing order from 1 to n-1

Step 4 - Print "* " (start, space) in increasing order

Step 5 – Return

Example #1: Check Armstrong Number of three digits

#include <stdio.h>

int main() {

   int n,i,j;

// number of rows.

printf(“Enter  number of rows you want to print: ”);

Scanf(“%d”,n);

   for(i = 1; i <= n; i++) {

      for(j = 1; j <= n-i; j++)

         printf(" ");

      for(j = 1; j <= i; j++)

         printf("* ");

      printf("\n");

   }

   return 1;

}

Output:

     *

    * *

   * * *

  * * * *

 * * * * *

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