KS4 - Programming
Lesson 20 - Scope
Activity sheet
Not ‘going global’
Worked example 1 .
Program with global variables used
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def double():
global num1
num1 = num1 * 2
num1 = int(input())
double()
print(num1)
Program with a function used instead
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Page 1
def double(a):
a = a * 2
return a
num1 = int(input())
num1 = double(num1)
print(num1)
Last updated: 17-05-21
KS4 - Programming
Lesson 20 - Scope
Activity sheet
Task .
Modify the programs so that they no longer use global variables, but perform the same
task. Use the worked example on the first page as a demonstration of this.
Program 1 .
Program with global variables used
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def triple():
global num1
num1 = num1 * 3
num1 = int(input())
triple()
print(num1)
Converted program (paste your code below)
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Make sure that you test your code against the original program to ensure
that it works correctly.
Page 2
Last updated: 17-05-21
KS4 - Programming
Lesson 20 - Scope
Activity sheet
Program 2 .
Program with global variables used
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def increase_score():
global score
if answer == "Yes":
score = score + 1
score = 0
answer = "Yes"
increase_score()
print(score)
Converted program (paste your code below)
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Make sure that you test your code against the original program to ensure
that it works correctly.
Page 3
Last updated: 17-05-21
KS4 - Programming
Lesson 20 - Scope
Activity sheet
Program 3 .
Program with global variables used
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def change_colour():
global colour
print(f"Your current colour is {colour}")
print("What would you like to change it to?")
colour = input()
colour = "Red"
change_colour()
print(f"Your current colour is {colour}")
Converted program (paste your code below)
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Make sure that you test your code against the original program to ensure
that it works correctly.
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Last updated: 17-05-21
KS4 - Programming
Lesson 20 - Scope
Activity sheet
Explorer task .
Program with global variables used
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def change_direction():
global direction
print(f"Current direction: {direction}")
print("Enter new direction")
direction = input()
def change_speed():
global speed
print(f"Current speed: {speed}")
print("Enter new speed")
speed = input()
speed = 10
direction = "North"
change_direction()
change_speed()
print(f"New direction: {direction}")
print(f"New speed: {speed}")
Converted program (paste your code below)
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Last updated: 17-05-21
KS4 - Programming
Lesson 20 - Scope
Activity sheet
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Make sure that you test your code against the original program to ensure
that it works correctly.
Further explorer task .
Write your own mini program
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Create a password checker that uses a global variable and convert it into a
function
If there is time, you could test your program on a partner to see if they can
convert it to a function
Resources are updated regularly — the latest version is available at: ncce.io/tcc.
This resource is licensed under the Open Government Licence, version 3. For more information on this
licence, see ncce.io/ogl.
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Last updated: 17-05-21