Decode School Karpagam Tech

C Program to draw Interesting Pattern IV

Sample Input 1 :

5

Sample Output 1 :

*       *
**     **
***   ***
**** ****
*********
**** ****
***   ***
**     **
*       *

Program or Solution

				
			
					
#include<stdio.h>
#include<math.h>
int main()
{
	int i,j,k,n,step=1;
	printf("enter row size:");
	scanf("%d",&n);
	for(i=1;i<=2*n-1;i++)
	{
		for(j=1;j<=step;j++)
		{
			printf("*");
		}

		for(k=1;k<=2*abs((n-i))-1;k++)
		{
			printf(" ");
		}
		
		for(j=1;j<=step;j++)
		{
			if(j!=n)
			printf("*");
		}

		if(i<n)
		{
			step+=1;
		}
		else
		{
			step-=1;
		}
		
		printf("\n");
	}
	return 0;
}

Program Explanation

Refer Video Tutorial

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