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print("2+5")
print(2+5)
print(3/5) vs. print(3//5)
print(2+3//5) vs. print((2+3)//5)
print(10 / 5 - 20 // 6 + (20 + 4) / (3 * 3 - 1))

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float speed; //determines speed of target and missile

//centre of missile (line) attributes
float missileX = -200;
float missileY = -200;
float missileLength = 0;

//tank attributes
float tankY = 0;
float tankHeight = 0;

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int x = 2; //range: -2 to the 31 to 2 to the 31 minus 1
int n = 30;

//x to the power of n is defined as x * x * x * ... n times

int result = 1; //answer we are going to "build" (multiplicative identity is 1)
int i = 1; //loop variable to count how many times loop should execute

while(i <= n) {
  result = result * x; 

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// String Introduction
String unitCode = "COMP1000"; 
//internally, there is a char[] named elements that is created to hold the 8 characters 

String str; // declare
str = "Peach"; // initalise
String myString = "Hello World"; // declare and initialise on the same line.

println("number of characters in "+unitCode+": "+unitCode.length());
println("number of characters in "+str+": "+str.length());

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int[] ali = {10, 70, 20, 90};
int[] bob = {30, 10, 40};
int[] cindy = {100};
int[] dina = null;

int[][] marks = {ali, bob, cindy, dina}; 

/*
reference copies :)

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//check if string is purely numeric
boolean isNumeric(String s) {
  if(s==null || s.length() == 0) {
    return false;
  }
  //guaranteed: s has at least one character
  for(int i=0; i < s.length(); i++) {
    char c = s.charAt(i);
    if(c < '0' || c > '9') {
      return false; //at least one character ain't a digit

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String a = "Taxi";
String b = "Taxi";
println("a == b: "+ (a == b));
println("a.equals(b): "+ (a.equals(b)));

String c = "Cab";
String d = new String("Cab"); //force a new instance
println("c == d: "+ (c == d));
println("c.equals(d): "+ (c.equals(d)));

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String name = "Messi";
println("number of characters in \""+name+"\": "+name.length());
println("first character: '"+name.charAt(0)+"'");
println("last character: '"+name.charAt(name.length()-1)+"'");

for(int i=0; i < name.length(); i++) {
  print("'"+name.charAt(i)+"'");
    if(i < name.length()-1) {
     print(", ");
  }

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String removeAllOccurrences(char ch, String s) { //BUGGY :(
  for (int idx=0; idx < s.length(); idx++) {
    if (s.charAt(idx) == ch) {
      String before = s.substring(0, idx);
      String after = s.substring(idx+1);
      s = before + after;
      idx--; //check the character after again
    }
  }
  return s;

gaurav1780

package comp6010_week_5_lecture;

import java.util.Arrays; //you are NOT allowed to have this in assignment 2

public class ArrayClient {

	public static void main(String[] args) {
		int x = -13; //primitive data typed variable
		int y = 500;
		System.out.println("x="+x);