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🚀 Programming Example

C program to print hollow mirrored inverted right triangle star pattern 
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💻 Practical Program
📘 Step Learning
Write a C program to print hollow mirrored inverted right triangle star pattern series of n rows using for loop. How to print hollow mirrored inverted right triangle star pattern in C program. Logic to print hollow mirrored inverted right triangle star pattern in C programming.
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💻 Program Code

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

#include <stdio.h>

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

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

    for(i=1; i<=rows; i++)
    {
        /* Print leading spaces */
        for(j=1; j<i; j++)
        {
            printf(" ");
        }

        /* Print hollow inverted right triangle */
        for(j=i; j<=rows; j++)
        {
            /*
             * Print star for ith column(j==i),
             * last column(j==rows) and for
             * first row(i==1).
             */ 
            if(j==i || j==rows || i==1)
            {
                printf("*");
            }
            else
            {
                printf(" ");
            }
        }

        printf("\n");
    }

    return 0;
}

🖥 Program 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 hollow inverted right triangle star pattern

Logic to print hollow mirrored inverted right triangle star pattern

 

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The above pattern is similar to inverted mirrored right triangle star pattern. In addition, in this pattern stars are printed only for first or last column and first row.

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

  1. Input number of rows to print from user. Store it in a variable say rows.
  2. To iterate through rows, run an outer loop from 1 to rows. The loop structure should look like for(i=1; i<=rows; i++).
  3. To print leading spaces, run an inner loop from 1 to i - 1. The loop structure should look like for(j=1; j. Inside this loop print single space.
  4. To print stars, run another inner loop from i to rows. The loop structure should look like for(j=1; j<=rows; j++). Inside this loop print star for ith or last column or for first row.
  5. After printing all columns of a row, move to next line i.e. print new line.
← Previous C Program - Write a program to find the factorial of a number using for loop
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First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.

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Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.

📌 Topic Information
Subject C Programming Language
Chapter Loop control in C Language
Sub-Chapter For Loop in C Language

⚡ Quick Practice Flow

Follow this learning sequence for better understanding.

  • Read the topic carefully
  • Understand the algorithm
  • Study the code line-by-line
  • Check the output result
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