Block based programming lesson 2

• Computing
• Lower Secondary (Key Stage 3)

Do Now
Predict the outcome of the code.   

Lesson 2: Block based programming

Understanding the fundamentals of programming

Lesson objectives 

Conquer: Understand the concept of loops in a program

 

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

Making tea

Last week we looked at the process we would follow to make 1 cup of tea.

• If this was a program we have coded, and we wanted to create 5 cups of tea we would have to repeat the instructions 5 times.

Our instructions would look like this

For 25 cups of tea

This would take a really long time if we were writing this program, so we use a coding concept called iteration (loop).

What could you do to these
instructions to loop them?

Using a Loop​

• A loop in a computer program is set of instructions that are repeated until the loop meets a STOP condition.​

• A STOP condition will tell the program when it’s completed.​
  

So instead of 10 lines of code, we can do it in 2.

Lets have a go at programming some sequences.

(ISL)

We now want BB8 to reach his treasured scrap, but we have a limit on the amount of code we can use.

Click here to get started.

Limited blocks

What is sequencing?

1. A set of instructions
2. A set of instructions in order.
3. A program created by code.
4. The result of our program when run.

What is a loop?

1. A set of instructions to complete a task.
2. A set of instructions in order.
3. A repeated section of code
4. The end result of your program.

What is programming?

1. The order in which we write our code.
2. The programs we use.
3. A set of instructions to complete a task.
4. The result of our program when run.