Scope

In this lesson, we will learn about the scope of variables. When a variable is initialised within a subroutine it cannot be easily accessed and modified by other subroutines. This lesson will teach us about the different levels of scope and show us how to access variables that are initialised within subroutines.

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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 will be the return value based on the function call to_the_power(3,2)?

1/3

Q2.What will be the return value based on the function call find_highest(12,9)?

2/3

Q3.What will be the return value based on the function call multiple(30,3)?

3/3

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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 will be the return value based on the function call to_the_power(3,2)?

1/3

Q2.What will be the return value based on the function call find_highest(12,9)?

2/3

Q3.What will be the return value based on the function call multiple(30,3)?

3/3

Video

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Worksheet

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This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

Scope

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

Q1.On which line is the global variable number assigned?

1/5

Q2.On which line is the local variable number assigned?

2/5

Q3.What value will line 8 output when this program is executed?

3/5

Q4.What will happen when this program is executed?

4/5

Q5.On which line of code does constant declaration occur?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

Scope

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

Q1.On which line is the global variable number assigned?

1/5

Q2.On which line is the local variable number assigned?

2/5

Q3.What value will line 8 output when this program is executed?

3/5

Q4.What will happen when this program is executed?

4/5

Q5.On which line of code does constant declaration occur?

5/5

Lesson summary: Scope

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Time to move!

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Jog

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Programming 4: Subroutines
is:
XOR

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