Java Program to Print Pyramid Star Pattern

In this article, we will understand how to print pyramid star pattern. The pattern is formed by using multiple for-loops and print statements.

Below is a demonstration of the same −

Input

Suppose our input is −

Enter the number of rows : 8

Output

The desired output would be −

The pyramid star pattern :        *       * *      * * *     * * * *    * * * * *   * * * * * *  * * * * * * * * * * * * * * *

Algorithm

Step 1 - START Step 2 - Declare three integer values namely i, j and my_input Step 3 - Read the required values from the user/ define the values Step 4 - We iterate through two nested 'for' loops inside a ‘for’ loop to get space between the characters. Step 5 - After iterating through the innermost loop, we iterate through another 'for' loop. This will help print the required character. Step 6 - Now, print a newline to get the specific number of characters in the subsequent lines. Step 7 - Display the result Step 8 - Stop

Example 1

Here, the input is being entered by the user based on a prompt. You can try this example live in our coding ground tool .

import java.util.Scanner; public class Pyramid{    public static void main(String args[]){       int i, j, my_input;       System.out.println("Required packages have been imported");       Scanner my_scanner = new Scanner(System.in);       System.out.println("A reader object has been defined ");       System.out.print("Enter the number of rows : ");       my_input = my_scanner.nextInt();       System.out.println("The pyramid star pattern : ");       for (i=0; i<my_input; i++){          for (j=my_input-i; j>1; j--){             System.out.print(" ");          }          for (j=0; j<=i; j++ ){             System.out.print("* ");          }          System.out.println();       }    } }

Output

Required packages have been imported A reader object has been defined Enter the number of rows : 8 The pyramid star pattern :        *       * *      * * *     * * * *    * * * * *   * * * * * *  * * * * * * * * * * * * * * *

Example 2

Here, the integer has been previously defined, and its value is accessed and displayed on the console.

public class Pyramid{ public static void main(String args[]){ int i, j, my_input; my_input = 8; System.out.println("The number of rows is defined as " +my_input); System.out.println("The pyramid star pattern : "); for (i=0; i<my_input; i++){ for (j=my_input-i; j>1; j--){ System.out.print(" "); } for (j=0; j<=i; j++ ){ System.out.print("* "); } System.out.println(); } } }

Output

The number of rows is defined as 8 The pyramid star pattern : * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *