PatternsTriangular Pattern

Lecture 31:- Triangular Pattern

Here are a few examples of triangular patterns using loops in Java:

1. Left-aligned Triangle:

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*
**
***
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public class LeftAlignedTriangle {
    public static void main(String[] args) {
        int n = 5;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}

2. Right-aligned Triangle:

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    *
   **
  ***
 ****
*****

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public class RightAlignedTriangle {
    public static void main(String[] args) {
        int n = 5;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j <= n - i; j++) {
                System.out.print(" ");
            }
            for (int k = 1; k <= i; k++) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}

3. Inverted Left-aligned Triangle:

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*****
****
***
**
*

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public class InvertedLeftAlignedTriangle {
    public static void main(String[] args) {
        int n = 5;
        for (int i = 5; i >= 1; i--) {
            for (int j = 1; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}

4. Inverted Right-aligned Triangle:

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*****
 ****
  ***
   **
    *

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public class InvertedRightAlignedTriangle {
    public static void main(String[] args) {
        int n = 5;
        for (int i = 1; i <= n; i++) {
            for (int j = 1; j < i; j++) {
                System.out.print(" ");
            }
            for (int k = i; k <= n; k++) {
                System.out.print("*");
            }
            System.out.println();
        }
    }
}

You can adjust the value of n to control the size of the triangles. Experiment with different loop structures to create other interesting patterns as well.

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