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Chapter 7
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‎ch07/Demo.java‎

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public class Demo
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{
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public static void main(String[] args)
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{
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int i = 1;
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int sum = 10;
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while (i <= 10)
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{
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System.out.println(i + " " + sum);
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i++;
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sum = sum + 10;
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}
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i = 100;
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sum = 10;
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System.out.println("Starting do while loop!");
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do
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{
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System.out.println(i);
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i++;
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} while (i <= 10);
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System.out.println("Starting for loop");
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for (int j = 1; j <= 10; j++)
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{
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System.out.println(j);
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}
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}
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}

‎ch07/DoWhile.java‎

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public class DoWhile
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{
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public static void main(String[] args)
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{
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int num = 100;
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do
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{
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System.out.println("DoWhile Countup: " + num);
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num = num + 10;
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} while (num < 10);
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}
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}

‎ch07/For.java‎

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public class For
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{
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public static void main(String[] args)
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{
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int num = 0;
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for (int i = 1; i < 4; i++)
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{
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System.out.println("Outer Loop i=" + i);
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for (int j = 1; j < 4; j++)
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{
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System.out.print("\tInner Loop= " + j);
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System.out.println("\t\tTotal num=" +(++num));
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}
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}
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}
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}

‎ch07/HigherThanOneThousand.java‎

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import java.util.Scanner;
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public class HigherThanOneThousand
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{
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public static void main(String[] args)
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{
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Scanner in = new Scanner(System.in);
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int yourNumber;
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System.out.print("Please enter a number: ");
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yourNumber = in.nextInt();
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int totalCount;
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totalCount = getPastOneThousand(yourNumber);
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System.out.println("You've entered a total of " + totalCount + " to finally achieve a total greater than 1000!");
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}
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public static int getPastOneThousand(int numberEntered)
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{
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Scanner in = new Scanner(System.in);
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while (numberEntered < 1000)
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{
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System.out.print("Enter another number: ");
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numberEntered = in.nextInt() + numberEntered;
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}
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return numberEntered;
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}
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}

‎ch07/LoopPractice.java‎

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public class LoopPractice
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{
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public static void main(String[] args)
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{
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forOneToTen();
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whileOneToTen();
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doWhileOneToTen();
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forTenToOne();
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whileTenToOne();
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doWhileTenToOne();
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forByTens();
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whileByTens();
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doWhileByTens();
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forSequence();
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whileSequence();
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doWhileSequence();
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printOneToNumber(15);
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}
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public static void forOneToTen()
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{
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for (int i = 1; i <= 10; i++)
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{
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System.out.println(i);
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}
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}
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public static void whileOneToTen()
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{
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int i = 1;
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while (i <= 10)
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{
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System.out.println(i);
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i++;
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}
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}
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public static void doWhileOneToTen()
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{
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int i = 1;
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do
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{
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System.out.println(i);
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i++;
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} while (i <= 10);
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}
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public static void forTenToOne()
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{
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for (int i = 10; i >= 1; i--)
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{
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System.out.println(i);
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}
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}
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public static void whileTenToOne()
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{
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int i = 10;
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while (i >= 1)
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{
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System.out.println(i);
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i--;
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}
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}
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public static void doWhileTenToOne()
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{
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int i = 10;
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do
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{
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System.out.println(i);
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i--;
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} while (i >= 1);
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}
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public static void forByTens()
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{
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for (int j = 0; j <= 100; j += 10)
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{
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System.out.println(j);
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}
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}
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public static void whileByTens()
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{
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int j = 0;
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while (j <= 100)
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{
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System.out.println(j);
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j += 10;
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}
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}
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public static void doWhileByTens()
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{
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int j = 0;
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do
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{
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System.out.println(j);
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j += 10;
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} while (j <= 100);
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}
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public static void forSequence()
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{
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for (int k = 100; k >= -100; k -= 8)
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{
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System.out.println(k);
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}
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}
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public static void whileSequence()
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{
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int k = 100;
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while (k >= -100)
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{
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System.out.println(k);
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k -= 8;
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}
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}
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public static void doWhileSequence()
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{
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int k = 100;
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do
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{
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System.out.println(k);
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k -= 8;
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} while (k >= -100);
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}
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public static void printOneToNumber(int n)
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{
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int k = 1;
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while (k <= n)
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{
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System.out.println(k);
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k += 1;
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}
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}
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}

‎ch07/While.java‎

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public class While
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{
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public static void main(String[] args)
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{
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int num = 100;
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while (num > 0)
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{
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System.out.println("While Countdown: " + num);
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num = num - 10;
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}
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}
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}

‎ch07/ZeroDestiny.java‎

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import org.w3c.dom.css.Counter;
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import java.util.Scanner;
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public class ZeroDestiny
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{
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public static void main(String[] args)
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{
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Scanner input = new Scanner(System.in);
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System.out.print("Enter your guess here ---> ");
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int yourNumber = input.nextInt();
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int count = 0;
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count = (youMustEnterZero(yourNumber));
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System.out.println("You entered a number other than zero " + count + " number of times.");
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}
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public static int youMustEnterZero(int n)
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{
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Scanner input = new Scanner(System.in);
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int count = 0;
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int k = n;
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while (k > 0)
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{
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System.out.print("Enter another number ---> ");
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k = input.nextInt();
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count = count + 1;
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}
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System.out.println("You entered zero!!!!");
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return count;
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}
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}

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