Java
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Hello World
Объявление переменных
1 int a = 5;
2 double b = 5.0 / 2;
3 boolean test = true;
4 char firstLetter = 'C';
5 String name = "Hi, there!";
6 int[] age = new int[5];
7 int[] age2 = {3, 7, 15, 21, 7};
Ввод и вывод
1 Scanner in = new Scanner(System.in);
2
3 System.out.println("Please, enter your age:");
4 int age = in.nextInt();
5 System.out.println("Your age = " + age);
Условный оператор
1 Scanner in = new Scanner(System.in);
2
3 System.out.println("Please, enter your age:");
4 int age = in.nextInt();
5 System.out.println("Your age = " + age);
6 if (age > 65)
7 {
8 System.out.println("Here is your pension.");
9 }
10 else
11 {
12 System.out.println("Good morning people!");
13 }
Циклы
1 System.out.println("while loop");
2 int i = 1;
3 while (i < 11)
4 {
5 System.out.println(i);
6 i++;
7 }
8
9 System.out.println("do while loop");
10 i = 1;
11 do
12 {
13 System.out.println(i);
14 i++;
15 } while (i < 11);
16
17 System.out.println("for loop");
18 for (int j = 1; j < 11; j++)
19 {
20 System.out.println(j);
21 }