C program to print reversed mirrored right triangle star pattern

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C program to print reversed mirrored right triangle star pattern

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

Required knowledge

Operators, Data Types in c, Variables in C, Basic input/output, C if-else, C Loops

Logic to print reversed mirrored right triangle star pattern

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

The above pattern is similar to inverted right triangle star pattern with leading spaces. The pattern consist of N rows and each row contains N - i + 1 stars. In addition to stars each row contains some leading spaces. For each row there are total i - 1 spaces (where i is current row number). Point your mouse cursor over the above pattern to count total spaces per row.

Step by step descriptive logic to print reversed mirrored 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 spaces, run an inner loop from 1 to i - 1. The loop structure should look like for(j=1; j<i; j++). Inside this loop print single space.
   Note: j

4. To print stars, run another inner loop from i to rows. The loop structure should look like for(j=i; j<=rows; j++). Inside the loop print star.

5. After printing all columns of a row, move to next line i.e. print new line.

Program to print reverse mirrored right triangle star pattern

 
/**
 * C program to print reverse mirrored right triangle star pattern
 */

#include <stdio.h>

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

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

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

        /* Iterate through columns to print star */
        for(j=i; j<=rows; j++)
        {
            printf("*");
        }

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

    return 0;
}

Output:

Enter number of rows: 5

 ****
  ***
   **
    *

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