Here is a java program to print a pyramid pattern of star(*) character. In Pyramid star pattern, ith row contains (i-1) space characters followed by (2*i - 1) star(*) characters. Check below mentioned pyramid pattern of 5 rows.
Sample Output
*
***
*****
*******
*********
Algorithm to print pyramid star pattern
- We first take the number of rows in the pattern as input from user and store it in a integer variable "rows".
- One iteration of outer for loop will print a row of pyramid pattern.
- There are two loops inside outer for loop. First for loop prints the spaces for every rows and following while loop prints (2*r - 1) stars for rth row of pyramid pattern.
Java Program to Print Pyramid Pattern of Star Character
package com.tcc.java.programs;
import java.util.*;
public class PyramidPattern {
public static void main(String args[]) {
int rows, i, space, star=0;;
Scanner in = new Scanner(System.in);
System.out.println("Enter number of rows in pattern");
rows = in.nextInt();
// printing one row in every iteration
for(i = 1; i <= rows; i++) {
// Printing spaces
for(space = 1; space <= rows-i; space++) {
System.out.print(" ");
}
// Printing stars
while(star != (2*i - 1)) {
System.out.print("*");
star++;;
}
star=0;
// move to next row
System.out.print("\n");
}
}
}
Output
Enter number of rows in pattern
6
*
***
*****
*******
*********
***********
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