Java/src/main/java/com/examplehub/basics/WhileLoop.java at master · JavaCimcoz/Java · GitHub

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package com.examplehub.basics;

public class WhileLoop {
  public static void main(String[] args) {
    /*
     * Syntax
     * while (condition) {
     *   // code block to be executed
     * }
     */

    /*
     * #####
     */
    int i = 1;
    while (i <= 5) {
      System.out.print("#");
      i++;
    }
    System.out.println();

    /*
     * 1 2 3 4 5 6 7 8 9 10
     */
    i = 1;
    while (i <= 10) {
      System.out.print(i + " ");
      i++;
    }
    System.out.println();

    /*
     * 2 4 6 8 10
     */
    i = 2;
    while (i <= 10) {
      System.out.print(i + " ");
      i += 2;
    }
    System.out.println();

    /*
     * 100 95 90 85 80
     */
    i = 100;
    while (i >= 80) {
      System.out.print(i + " ");
      i -= 5;
    }
    System.out.println();

    /*
     * 1 3 5 7 9 2 4 6 8 10
     */
    int[] numbers = {1, 3, 5, 7, 9, 2, 4, 6, 8, 10};
    i = 0;
    while (i < numbers.length) {
      System.out.print(numbers[i] + " ");
      i++;
    }
    System.out.println();

    /*
    while (true) {
        infinite loop
    }
    */

    /*
     * 1+2+3+4...+100 = 5050
     */
    int sum = 0;
    i = 1;
    while (i <= 100) {
      sum += i;
      ++i;
    }
    System.out.println("1+2+3+4...+100 = " + sum);
  }
}