Small basic lesson 3 (Mr Evlat)

• Computing
• Lower Secondary (Key Stage 3)

Identify the 3 names of the variables in these programs

1.

2.

3.

Extension

Toxicode

Do Now answer

Age

(User input)

Lesson objectives 

Conquer: Use variables to store values within code.

 

Aspire Higher: Create conditional statements using variables

 

 

Aspire: Create a set of loops to make a program more efficient.

What is the most suitable variable name to store a users favorite drink.

1. Drink = Coke
2. Food = Coke
3. Variable = Coke`
4. Data = Coke

What is the purpose of this line of code?

TextWindow.Read()

1. Writes text to screen
2. Saves information
3. Allows the user to enter information
4. Makes the background see through.

A variable is a method of ....

1. Writing text to screen.
2. Storing information
3. Running you program
4. Searching for Bugs

If Statements/Conditionals

• Today we are going to look at a new programming method called if Statements. 

• If statements use variables and information users enter to make decisions. 

If statements / Conditionals

If statements

• We can program the computer to change how it responds using information we give it.

• Here the response we have changes based on the answer to the question "Is it raining?"

Match the programming terms to the code

Variable

If statement

True output

False output

Shape Drawing Program

1. Shape selected at start of program and added to variable called "Shape".

2. If shape selected is rectangle run code to draw a rectangle.

Must haves

1. Variable name must match.

2. Code in IF statement needs indentation (space).

3. EndIf to show code in IF statement completed.

Small basic

Click here

TextWindow.WriteLine("What shape would you like? Square, Rectangle or Triangle?")

Shape = TextWindow.Read()

if Shape = "Rectangle" then

    Turtle.Move(100)

    Turtle.Turn(90)

    Turtle.Move(50)

    Turtle.Turn(90)

    Turtle.Move(100)

    Turtle.Turn(90)

    Turtle.Move(50)

    EndIf

Model Shape Drawing Program

Replicate the code below for drawing a rectangle if selected

1. Add another if statement for a square option
   
2. Add another if statement for a triangle option

Small basic

Click here

TextWindow.WriteLine("What shape would you like? Square, Rectangle or Triangle?")

Shape = TextWindow.Read()

if Shape = "Rectangle" then

    Turtle.Move(100)

    Turtle.Turn(90)

    Turtle.Move(50)

    Turtle.Turn(90)

    Turtle.Move(100)

    Turtle.Turn(90)

    Turtle.Move(50)

    EndIf

Extension 

Complete 2 additional shapes Hexagon and 

Why do we need if statements in programming?

Programs like Minecraft need to use If statements so the program can make decisions based on what the user does

For example:

• If the player walks into lava, then the game takes damage away.
• If it becomes night, then mobs start to spawn.
  
• If the player breaks a block, then the block drops an item.
  
• If the hunger bar is low, then the player can’t sprint.
  

Without If statements, the game wouldn’t react to anything - it would just run in a straight sequence.

If statements allow the game world to change, respond, and behave differently depending on conditions.