# Selection

In this lesson, we will move on to the next big programming construct: selection. We will be introduced to it initially through a flowchart that demonstrates how a condition can be used to control the flow of execution in a program. We will then learn about definitions for logical expressions and conditions. A short activity has been included to allow us to grasp how logical expressions evaluate. Next, we will complete a PRIMM activity where we investigate and modify a chatterbot.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What is the evaluation of this expression: 10 * 10 / 5

1/4

Q2.What is the evaluation of this expression: 5 - 2 + 6 / 2

2/4

Q3.If you were using integer division, what would be the evaluation of this expression: 14//3

3/4

Q4.If you were using modulo, what would be the evaluation of this expression: 14%3

4/4

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.What is the evaluation of this expression: 10 * 10 / 5

1/4

Q2.What is the evaluation of this expression: 5 - 2 + 6 / 2

2/4

Q3.If you were using integer division, what would be the evaluation of this expression: 14//3

3/4

Q4.If you were using modulo, what would be the evaluation of this expression: 14%3

4/4

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

Quiz:

# Selection

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Which flowchart symbol is used to show a decision?

1/3

Q2.Will this logical expression evaluate as True or False? (5-2+10/2) == 8

2/3

Q3.What will be the output of this program when it is executed? 3/3

Quiz:

# Selection

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Which flowchart symbol is used to show a decision?

1/3

Q2.Will this logical expression evaluate as True or False? (5-2+10/2) == 8

2/3

Q3.What will be the output of this program when it is executed? 3/3

# Lesson summary: Selection

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Walk

On the spot:
Dance