C program to print rhombus or parallelogram star pattern ***** ***** *

Programming Example

C program to print rhombus or parallelogram star pattern

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💻 Practical Program

📘 Step by Step Learning

Write a C program to print rhombus star pattern of N rows using for loop. How to print rhombus or parallelogram star pattern using for loop in C programming. Logic to print rhombus or parallelogram star pattern series in C program.

Program Code

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

#include <stdio.h>

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

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

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

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

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

    return 0;
}

Output

Enter rows: 5
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Explanation

Logic to print rhombus star pattern

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Before I decode the logic of this pattern, have a close look of the pattern. Place your mouse cursor on to the pattern, to count spaces. Try to decode the logic of given pattern.

If you remove trailing spaces the pattern becomes a simple square star pattern of N rows and columns. You only need to add logic of printing spaces with the existing logic of square star pattern.

The pattern consists N - i spaces per row (where i is the current row number).

Step by step descriptive logic to print rhombus star pattern

Input number of rows from user. Store it in a variable say rows.
To iterate through rows, run an outer loop from 1 to rows. Define a loop with structure for(i=1; i<=rows; i++).
To print spaces, run an inner loop from 1 to rows - i. Construct a loop with structure for(j=1; j<=rows - i; j++). Inside this loop print space.
To iterate through columns for printing stars. Run another inner loop from 1 to rows. Define another loop with structure for(j=1; j<=rows; j++). Inside this loop print star.
After printing all columns of a row 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 rhombus or parallelogram star pattern
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Program Code

Output

Explanation

Logic to print rhombus star pattern

How to learn from this program

Practice suggestion

Quick Practice Flow

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C program to print rhombus or parallelogram star pattern ***** ***** ***** ***** *****

Program Code

Output

Explanation

Logic to print rhombus star pattern

How to learn from this program

Practice suggestion

Quick Practice Flow

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C program to print rhombus or parallelogram star pattern
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