- Java program to print isosceles triangle star pattern using for loop.
Sample Output,
*
* *
* * *
* * * *
* * * * *
* * * *
* * *
* *
*
Java program to print isosceles star pattern
package com.tcc.java.programs;
public class StarPatternThree {
public static void main(String[] arg) {
int i, j, c = 0;
int rows = 9;
// Printing Upper half of pattern
// Outer for loop prints one row in every iteration
for (i = 0; i < rows / 2 + 1; i++) {
/* Inner for loop prints n * characters for nth row */
for (j = 1; j <= i + 1; j++) {
System.out.print("* ");
}
System.out.print("\n");
}
// Printing lower half of pattern
// Outer for loop prints one row in every iteration
// Number of stars decreases with every consecutive rows
for (i = 0; i <= rows / 2; i++) {
/* for Nth row, it prints n-i+1 star character */
for (j = 1; j <= rows / 2 - i; j++) {
System.out.print("* ");
}
System.out.print("\n");
}
}
}
Output
*
* *
* * *
* * * *
* * * * *
* * * *
* * *
* *
*
