C program to print hollow inverted right triangle star pattern ***** *

Programming Example

C program to print hollow inverted right triangle star pattern

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📘 Step by Step Learning

Write a C program to print hollow inverted right triangle star pattern of n rows using for loop. How to print hollow inverted right triangle star pattern series of n rows in C program. Logic to print hollow inverted right triangle star pattern in C programming.

Program Code

/**
 * C program to print hollow inverted right triangle star pattern
* atnyla.com
 */

#include <stdio.h>

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

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

    /* Iterate through rows */
    for(i=1; i<=rows; i++)
    {
        /* Iterate through columns */
        for(j=i; j<=rows; j++)
        {
            /* 
             * Print stars for first row(i==1), 
             * first column(j==1) and 
             * last column(j=rows).
             */
            if(i==1 || j==i || j==rows)
            {
                printf("*");
            }
            else
            {
                printf(" ");
            }
        }

        /* Move to next line */
        printf("\n");
    }

    return 0;
}

Output

Enter number of rows: 5
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Explanation

Required knowledge

Basic C programming, If else, For loop, Nested loop

Must know -

Program to print inverted right triangle star pattern

Program to print hollow right triangle star pattern

Logic to print hollow inverted right triangle star pattern

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The above pattern contains N row and each row contains N - i + 1 columns. For each row stars are printed for first or last column or for first row.

Step by step descriptive logic to print hollow inverted right triangle star pattern.

Input number of rows to print from user. Store it in a variable say rows.
To iterate through rows, run an outer loop from 1 to rows. The loop structure should look like for(i=1; i<=rows; i++).
To iterate through columns, run an inner loop from i to rows. The loop structure should look like for(j=i; j<=rows; j++).
Note: You can also run loop from 1 to rows - i + 1.
Inside the inner loop print star for first and last column or for first row otherwise print space.
After inner loop move to next line i.e. print new line.

How to learn from this program

First read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.

Practice suggestion

After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.

C program to print hollow inverted right triangle star pattern
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Program Code

Output

Explanation

Required knowledge

Logic to print hollow inverted right triangle star pattern

How to learn from this program

Practice suggestion

Quick Practice Flow

Related Programs

C program to print hollow inverted right triangle star pattern ***** * * * * ** *

Program Code

Output

Explanation

Required knowledge

Logic to print hollow inverted right triangle star pattern

How to learn from this program

Practice suggestion

Quick Practice Flow

Related Programs

C program to print hollow inverted right triangle star pattern
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