rmg007

Primitive Types in Python

Python has 4 primitive data types:

1. Integers (ex. 1, 2, 3)
2. Float (ex. 1.2, 2.5, 5.8)
3. Strings (ex. "Alexandria", "John", "Tony")
4. Boolean (True, False)

What is a list?

A list is a data structure in Python that is a mutable, or changeable, ordered sequence of elements.
They use [] brackets and commas to separate objects in the list.

rmg007

public class Main {
  public static void main(String[] args) {
    System.out.print("Hello ");
    System.out.print("World");

    // println-> add new line at the end
    System.out.println("First Line");
    System.out.println("Second Line");

    System.out.println(10);

rmg007

public class FirstProgram {
  public static void main(String[] args) {
    System.out.println("Hello World");
  }
}

rmg007

public class Main {
  /*
  block comment
  multi-line comment
   */
  public static void main(String[] args) {
    // single-line comment
    System.out.println("one");
    System.out.println("two");
    System.out.println("three");  // comment at the end of the line

rmg007

public class Main {
  // instance variable
  int myAge = 29;

  // static/class variables
  static int salary = 90000;

  public static void main(String[] args) {
    // local variable
    int age; // declared variable of type int, variable name is "age"

rmg007

public class Main {
  // instance variable
  int myAge = 29;

  // static/class variables
  static int salary = 90000;

  //int age = 222;
  static int age = 444;
  public static void main(String[] args) {

rmg007

public class Main {

  /*
      byte (-128  --   127)
      short (-32768  --   32767)
      int (-2147483648  --   2147483647)
      long (-9223372036854775808  --   9223372036854775807)

      float: 7 decimal digits
      double: 15 decimal digits

rmg007

public class Main {
  /*
      +, -, *, /, %, ++, --
   */
  public static void main(String[] args) {
    int x = 8;
    double y = 5;
    //double addition = x + y;

  int addition = (int) (x + y);

rmg007

public class Main {

  /*
      +, -, *, /, %, ++, - -
   */
  public static void main(String[] args) {

    int x = 5;
    int y = 2;
    // modulo operator  -  %  division remainder

rmg007

public class Main {

  /*
      = , +=, -=, /=, *=
   */
  public static void main(String[] args) {
    int x = 6;
    x += 2; // x = x + 2;
    System.out.println(x);