HashMap<String, Integer> myFriends = new HashMap<String, Integer>();

myFriends.put("Mark", 24);
myFriends.put("Cassandra", 25);
myFriends.put("Zenas", 21);

System.out.println( myFriends.size() );

for (String name: myFriends.keySet()) {

System.out.println(name + " is age: " + myFriends.get(name));

}

for (int counter = 0; counter < 5; counter++) {

System.out.println("The counter value is: " + counter);

}

ArrayList<Integer> quizGrades = new ArrayList<Integer>();
quizGrades.add(95);
quizGrades.add(87);
quizGrades.add(83);

ArrayList<Integer> quizGrades = new ArrayList<Integer>();
quizGrades.add(95);
quizGrades.add(87);
quizGrades.add(73);

quizGrades.add(0, 100);
System.out.println( quizGrades.get(0) );

HashMap<String, Integer> myFriends = new HashMap<String, Integer>();

myFriends.put("Mark", 24);
myFriends.put("Cassandra", 25);
myFriends.put("Zenas", 21);

System.out.println( myFriends.size() );

for (String name: myFriends.keySet()) {

System.out.println(name + " is age: " + myFriends.get(name));

for (Integer temperature : weeklyTemperatures) {
System.out.println(temperature);
}