Home› C Programming Language› / Programs / C program to print diamond star pattern * *** ***** ******* ********* ******* ***** *** *
🚀 Programming Example

C program to print diamond star pattern 
    *
   ***
  *****
 *******
*********
 *******
  *****
   ***
    *

👁 3,284 Views
💻 Practical Program
📘 Step Learning
Write a C program to print diamond star pattern series using for loop. How to print diamond star pattern structure in C program. Logic to print diamond star pattern series in C programming.
← Previous C Program - Write a program to find the factorial of a number using for loop

💻 Program Code

/**
 * C program to print diamond star pattern 
 */

#include <stdio.h>

int main()
{
    int i, j, rows;
    int stars, spaces;
   
    printf("Enter rows to print : ");
    scanf("%d", &rows);
    
    
    stars = 1;
    spaces = rows - 1;
    
    /* Iterate through rows */
    for(i=1; i<rows*2; i++)
    {
        /* Print spaces */
        for(j=1; j<=spaces; j++)
            printf(" ");
        
        /* Print stars */
        for(j=1; j<stars*2; j++)
            printf("*");
        
        /* Move to next line */
        printf("\n");
        
        if(i<rows)
        {
            spaces--;
            stars++;
        }
        else
        {
            spaces++;
            stars--;
        }
    }
    
    return 0;
}

🖥 Program Output

Enter N: 5
    *
   ***
  *****
 *******
*********
 *******
  *****
   ***
    *

📘 Explanation

Required knowledge

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

Logic to print diamond star pattern

 

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

 

The given pattern is a combination of simple pyramid star pattern and inverted pyramid star pattern. It consist of N*2-1 rows (for this case N=5). Each row contain spaces and stars in printed in increasing and decreasing order.

Stars are printed in increasing order till Nth row. After Nth row stars are printed in decreasing order.

Spaces are printed in decreasing order till Nth row. After Nth row spaces are printed in increasing order. Point your mouse cursor over the pattern to count total spaces.

Step by step descriptive logic to print diamond star pattern.

  1. Input number of rows to print from user (in real number of rows/2). Store it in a variable say rows.
  2. Declare two variables to keep track of total columns to print each row, say stars=1 and spaces=N-1.
  3. To iterate through rows, run an outer loop from 1 to rows*2-1. The loop structure should look like for(i=1; i.
  4. To print spaces, run an inner loop from 1 to spaces. The loop structure should look like for(j=1; j<=spaces; j++). Inside this loop print single space.
  5. To print stars, run another inner loop from 1 to stars*2-1. The loop structure should look like for(j=1; j<=stars; j++). Inside this loop print star.
  6. After printing all colu
← Previous C Program - Write a program to find the factorial of a number using for loop
📚 Learning Subject

Master Programming Through Practical Examples

Improve your coding logic, problem-solving skills and programming confidence by practicing real-world examples with explanations.

💡 Beginner Friendly
🧠 Logic Building
⚡ Practical Coding
Start Learning →

🎯 How to learn from this example

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.

🔥 Practice suggestion

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
  • Practice by modifying logic

📚 Related Programs

Explore more practical programming examples.
1
static block in java,we can execute a program without main() method
2
My First Program In C: Hello World!!
3
Variable definition and actual initialization
4
Variable definition and actual initialization, return type int
5
A program to print one line of text using C Programming Language
6
Program to add two numbers
7
Program to find sum of two numbers using c programming language.
8
Program to find subtraction of two numbers using c programming language
9
Program to find multiplication of two numbers.
10
Program to find division of two numbers.