package week_1;

import java.util.Scanner;

public class SwitchDemo {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.println("enter you membership level");

String s = scanner.nextLine();

switch(s) {

case "platinum":

System.out.println("super");

break;

case "gold":

System.out.println("duper");

break;

case "silver":

System.out.println("member");

break;

default:

System.out.println("not found");

}

// more or less the same as

if (s.equalsIgnoreCase("platinum")){

System.out.println("super");

} else if (s.equalsIgnoreCase("gold")){

System.out.println("duper");

} else if (s.equalsIgnoreCase("silver")){

System.out.println("member");

} else {

System.out.println("not found");

}

}

}

long l = 122344l;

float f = l;

package week_2;

public class ArraysDemo {

public static void main(String[] args) {

// create empty array

int[] nums = new int[5];

// populate array

nums[4] = 10;

nums[1] = 20;

nums[2] = 30;

nums[3] = 40;

nums[0] = 50;

// array indices start at zero

System.out.println(nums[5]);

for(int i = 0; i < nums.length; i++){

System.out.print(nums[i] + " - ");

}

System.out.println();

// another way to declare an array

int[] vals = {12, 34, 56, 78};

System.out.println(vals[2]);

// final loop to learn - for-each

for(int trex : vals){ System.out.print(trex + " - ");}

// create array of size 3

char[] characters = new char[3];

characters[0] = 'z'; // put "z" in index 0

characters[1] = 'm'; // put "m" in index 1

characters[2] = 'w'; // put "w" in index 2

System.out.println(characters[1]);

if (characters[0] == 'z') {

//...

if (10 > 8){

// ...

} else {

// ...

}

} else if (characters[0] == 'm'){

// ..

}

}

}

package week_2;

import java.util.Scanner;

public class Challenge1 {

// Ask the user to enter two numbers.

// Print which number is greater or if they are equal.

public static void main(String[] args) {

// create two vars to hold the user input

int a;

int b;

String response = "";

// create Scanner to get user input

Scanner input = new Scanner(System.in);

do {

// give user instructions

System.out.println("enter your first number: ");

// assign the input from the scanner to the variables

a = input.nextInt();

System.out.println("enter your second number: ");

b = input.nextInt();

if (a > b) {

System.out.println(a + " is greater than " + b);

} else if (b > a) {

System.out.println(b + " is greater than " + a);

} else {

System.out.println(b + " and " + a + " are equal");

}

System.out.println("would you like to do this again? (yes/no)");

response = input.next();

} while(response.equalsIgnoreCase("yes"));

System.out.println("done");

}

}

package week_2;

public class Challenge2 {

// Print whether each number from 1 to 20 is even or odd using a `for` loop.

public static void main(String[] args) {

for(int i = 1; i < 21; i++){

if(i % 2 == 0){

System.out.println(i + " is even");

} else {

System.out.println(i + " is odd");

}

}

}

}

package week_2;

public class LoopsDemo {

public static void main(String[] args) {

// finite iteration

//for (initialize counter; boolean condition; incrementer)

// non-finite iteration

int count = 0;

// while (boolean condition is true) -> loop

while(count < 100){

// make sure you have a way out

count++;

if (count == 50){

// break out of the nearest loop (or switch statement)

break;

}

if (count % 2 == 0){ // if count is even

// forces an early iteration of the loop

continue;

}

System.out.println("true count = " + count);

}

System.out.println("all done");

}

}

Discussion on using the debugger.

* it returns the remainder of a division operation

2. **What is the result of `while(false)`?**

* this loop will not run - only runs when condition is true

* do-while loop will always execute the body of the loop at least once

* zero - the default value of an int primitive is zero

*

* it will immediately exit the loop or switch and go to the next line of code

outside/below the loop (or switch)

7. **What does `continue` do inside a loop?**

* `continue` will send the flow of execution directly back to the beginning of the loop