Nested for Loops in Java

Chapter 10

Nested for Loops in Java

Class 10 - Logix Kips ICSE Computer Applications with BlueJ

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Java Program: Java Program to Display the Pattern

2 (iii). Write a program in Java to display the following patterns.

Java Program: Java Program to Display the Pattern

public class HashStarPattern {
    public static void main(String[] args) {
 
        for (int i = 1; i <= 5; i++) {
 
            for (int j = 1; j <= i; j++) {
 
                if (i % 2 == 1)
                    System.out.print("# ");
                else
                    System.out.print("* ");
            }
 
            System.out.println();
        }
    }
}

#

* *

# # #

* * * *

# # # # #

✅ Explanation

🔹 Outer Loop (i)

• Controls the number of rows (1 to 5).

🔹 Inner Loop (j)

• Prints symbols equal to the row number.

🔹 Condition

if (i % 2 == 1)

• Odd rows → prints #
• Even rows → prints *

🔹 Line Break

System.out.println();

• Moves to the next line after each row.

✅ Key Concepts Used

✔ Nested loops
✔ Modulus operator %
✔ Pattern programming