Patterns

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Lecture 30:- Patterns

In Java, you can create various patterns using loops. Patterns are a great way to practice loop control and create interesting visual designs. Here are a few examples of different patterns you can create using nested loops:

  1. Pattern 1 - Right Triangle:

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

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public class Pattern1 {    public static void main(String[] args) {        for (int i = 1; i <= 5; i++) {            for (int j = 1; j <= i; j++) {                System.out.print("*");            }            System.out.println();        }    } }

  1. Pattern 2 - Inverted Right Triangle:

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

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public class Pattern2 {    public static void main(String[] args) {        for (int i = 5; i >= 1; i--) {            for (int j = 1; j <= i; j++) {                System.out.print("*");            }            System.out.println();        }    } }

  1. Pattern 3 - Pyramid:

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    *   ***  ***** ******* *********

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public class Pattern3 {    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 <= 2 * i - 1; k++) {                System.out.print("*");            }            System.out.println();        }    } }

  1. Pattern 4 - Diamond:

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

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public class Pattern4 {    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 <= 2 * i - 1; k++) {                System.out.print("*");            }            System.out.println();        }        for (int i = n - 1; i >= 1; i--) {            for (int j = 1; j <= n - i; j++) {                System.out.print(" ");            }            for (int k = 1; k <= 2 * i - 1; k++) {                System.out.print("*");            }            System.out.println();        }    } }

These are just a few examples of the patterns you can create using loops in Java. Patterns can be as simple or as complex as you like, depending on the logic you use in the loops. They are a fun and creative way to practice loop control and problem-solving skills.

6. Loops

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