C program to print mirrored rhombus, parallelogram star pattern
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C Programming Language / Loop control in C Language

23624

Program:

/*
 * C program to print mirrored Rhombus star pattern series
* atnyla.com
 */

#include <stdio.h>

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

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


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

        for(j=1; j<=N; j++)
        {
            printf("*");
        }

        printf("\n");
    }

    return 0;
}

Output:

Enter rows: 5
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Explanation:

Logic to print mirrored rhombus star pattern

 

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The above pattern contains N rows and each row contains N columns (where N is total rows to be print). If you have noticed there are i - 1 spaces per row (where i is current row number). You can hover or click on to the above pattern to see or count total spaces per row.

Step by step descriptive logic to print mirrored rhombus star pattern.

  1. Input number of rows to print from user. Store it in a variable say N.
  2. To iterate through rows, run an outer loop from 1 to N, increment 1 in each iteration. The loop structure should look like for(i=1; i<=N; i++).
  3. To print spaces, run an inner loop from 1 to i - 1 with structure for(j=1; j<i; j++). Inside this loop print single blank space.
  4. To print stars, run another inner loop from 1 to N with structure for(j=1; j<=N; j++). Inside this loop print star.
  5. After printing all columns of a row, move to next line i.e. print new line.

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