Unit 2 is about structures in programming: IF-ELSE, WHILE LOOPS, FOR LOOPS and RANDOM NUMBERS.

By the end of Unit 2 you should know

• how to write if and else statements
• how to write else-if (but only use when absolutely necessary)
• how to write nested if statements
• how to use logical operators: AND, OR, NOT
• how to use comparison operators: ==   !=   <   <=   >   >=
• that strings should be compared using .equals() instead of ==
• that you should not check for booleans to be true or false because it leads to errors
  if (gameOver == true) //never do this
• how to write while loops with conditions or with while(true)
• how to write do-while loops
• how to use break and continue in while/for loops
• how to use for loops (eg. to print something out 20 times)
• how to make for loops that start at a given number and increase by a certain amount
• when to use for loops and when to use while loops
• how to use Math.random() to set a certain percentage of something happening (e.g. a 30% chance that weather = "rain")
• how to make random numbers using both Math.random() and java.util.Random object
• make a random integer between 1 and some number
• switch statements