100

This will cause the program to run the code an infinite amount of times.

This will cause the program to crash

20

Scanner in = new Scanner(System.in);

java.scanner.util

import java.scanner

Import java.util.Scanner;

import java.model.Scanner

public

static

int

return

void

So you can access it anywhere in the code

To ensure you can only use it once

To keep it hidden from other classes

So you can use it multiple times

String fullName = fName + " " + sName;

String fullName == fName + " " + sName;

String fullName = fName + sName;

fullName = fName + " " + sName;

fullName = fName + sName;