Here is a Java program to print right angled triangle star pattern. A Right triangle star pattern contains N space separated '*' characters in Nth row. In this program, we will use two for loops, outer for loop will print one row in every iteration whereas inner for loop will print N '*' characters for Nt row.
Sample Output * * * * * * * * * * * * * * *
Algorithm to print right triangle star pattern
- Take the number of rows of right triangle as input from user and store it in an integer variable N
- Number of star characters in Kth row is always K. 1st row contains 1 star, 2nd row contains 2 stars. In general, Kth row contains K stars.
- We will use two for loops to print right triangle star pattern.
- Each iteration of outer loop will print one row of the pattern. For a right triangle star pattern of N rows, outer for loop will iterate N time.
- Each iteration of inner loop will print one star (*). For Kth row of right triangle pattern, inner loop will iterate K times.
Java program to print triangle star pattern
package com.tcc.java.programs;
import java.util.*;
public class RightTrianglePattern {
public static void main(String args[]) {
int rows, i, j;
Scanner in = new Scanner(System.in);
System.out.println("Enter number
of rows in pattern");
rows = in.nextInt();
for(i = 1; i <= rows; i++) {
for(j = 1; j <= i; ++j) {
System.out.print("* ");
}
System.out.print("\n");
}
}
}
Output
Enter number of rows in pattern 6 * * * * * * * * * * * * * * * * * * * * *
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