C program to print left arrow star pattern

Write a C program to print left arrow star (*) pattern series using for loop. How to print left arrow (mirrored arrow) star pattern structure using for loop in C programming. Logic to print left arrow star pattern in C program.

Example

Input

Input N: 5

Output

Required knowledge

Basic C programming, For loop

Logic to print left arrow star pattern

Let's first divide this pattern in two parts to make our task easy.

If you have noticed number of spaces in the upper part per row is n - rownumber and bottom part contains rownumber - 1 spaces per row (where n is the total number of rows). If you ignore the trailing spaces in both parts you will notice that the upper part is similar to inverted right triangle and lower part is similar to right triangle star pattern.

Program to print left arrow star pattern

/**
 * C program to print left arrow star pattern
 */

#include <stdio.h>

int main()
{
    int i, j, n;

    // Input number of rows from user
    printf("Enter value of n : ");
    scanf("%d", &n);

    // Print upper part of the arrow
    for(i=1; i<n; i++)
    {
        // Print trailing (n-rownumber) spaces
        for(j=1; j<=(n-i); j++)
        {
            printf(" ");
        }

        // Print inverted right triangle
        for(j=i; j<=n; j++)
        {
            printf("*");
        }

        printf("\n");
    }

    // Print bottom part of the arrow
    for(i=1; i<=n; i++)
    {
        // Print trailing (rownumber-1) spaces
        for(j=1; j<i; j++)
        {
            printf(" ");
        }

        // Print the right triangle
        for(j=1; j<=i; j++)
        {
            printf("*");
        }

        printf("\n");
    }

    return 0;
}

Output

Enter value of n : 5
    *****
   ****
  ***
 **
*
 **
  ***
   ****
    *****

Happy coding 😉

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