C Program to Print Sandglass Number Pattern

C program to print sandglass number pattern; Through this tutorial, we will learn how to print sandglass number pattern using for loop and while loop in c programs.

Programs to Print Sandglass Number Pattern in C

• C Program to Print Sandglass Number Pattern using For Loop
• C Program to Print Sandglass Number Pattern using While Loop

C Program to Print Sandglass Number Pattern using For Loop

#include <stdio.h>

int main()
{
    int i, j, k, rows;
    
    printf("Enter Sandglass Number Pattern Rows = ");
    scanf("%d",&rows);

    printf("The Sandglass Number Pattern\n"); 

	for (i = 1 ; i <= rows; i++ ) 
	{
		for (j = 1; j < i; j++ ) 	
		{
			printf(" ");
		}
		for (k = i; k <= rows; k++ ) 	
		{
			printf("%d ", k);
		}
		printf("\n");
	}
    
    for (i = rows - 1; i >= 1; i-- ) 
	{
		for (j = 1; j < i; j++ ) 	
		{
			printf(" ");
		}
		for (k = i; k <= rows; k++ ) 	
		{
			printf("%d ", k);
		}
		printf("\n");
	}
		
    return 0;
}

The output of the above c program; is as follows:

Enter Sandglass Number Pattern Rows = 5
The Sandglass Number Pattern
1 2 3 4 5 
 2 3 4 5 
  3 4 5 
   4 5 
    5 
   4 5 
  3 4 5 
 2 3 4 5 
1 2 3 4 5 

C Program to Print Sandglass Number Pattern using While Loop

#include <stdio.h>

int main()
{
    int i = 1, j, k, rows;
    
    printf("Enter Sandglass Number Pattern Rows = ");
    scanf("%d",&rows);

    printf("\nThe Sandglass Number Pattern\n"); 

	while( i <= rows)
    {
    	j = 1;
    	while( j < i)	
		{
			printf(" ");
		    j++;
        }

        k = i;
        while( k <= rows )
        {
			printf("%d ", k);
			k++;
		}
		printf("\n");
		i++;
	}
    
    i = rows - 1;
    while( i >= 1)
    {
        j = 1;
    	while( j < i)
		{
			printf(" ");
		    j++;
        }

        k = i;
        while( k <= rows )
        {
			printf("%d ", k);
		    k++;
        }
		printf("\n");
		i--;
	}
		
    return 0;
}

The output of the above c program; is as follows:

Enter Sandglass Number Pattern Rows = 5
The Sandglass Number Pattern
1 2 3 4 5 
 2 3 4 5 
  3 4 5 
   4 5 
    5 
   4 5 
  3 4 5 
 2 3 4 5 
1 2 3 4 5 

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