Functions – Scope

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. What is a local variable?

A A variable created inside a function

B A variable outside all functions

2. What is a global variable?

A A variable inside a function

B A variable created outside all functions

3. def func():\n x = 5\nprint(x)\nWhat happens?

A Prints 5

B NameError x doesn't exist outside func

4. x = 10\ndef show():\n print(x)\nshow()\nWhat prints?

A 10

B Error

5. When does a local variable stop existing?

A When the function finishes

B When the program ends

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1def func(): x = 10 print(x)		AOutput: Hi
2count = 0 def add_one(): count += 1		BError: Can't modify global without 'global'
3x = 5 def show(): print(x) show()		COk: 'global' lets you modify it
4count = 0 def add(): global count count += 1		DOutput: NameError
5def func(): y = 99 func() print(y)		EError: x is local, not visible outside
6msg = 'Hi' def greet(): print(msg) greet()		FValid: Read global inside function

Definitions

Scope

Fill in the Blanks

Complete each line of code by filling in the missing parts.

def func(): x = 5 # x is a _____ variable

x = 10 # x is a ______ variable def func(): print(x)

def func(): y = 5 func() print(y) # causes _________Error

x = 'outside' def func(): x = 'inside' print(x) # prints ________

def add(a, b): result = a + b ______ result

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A def func():

B x = 5

D print(x)

Question 2

A def func():

B x = 5

D func()

E print(x)

Question 3

A def add(a, b):

B result = a + b

D add(3, 5)

E print(result)

Question 4

A name = 'Alice'

B def change():

C name = 'Bob'

E change()

F print(name) # expects Bob

Question 5

A def greet():

B msg = 'Hello'

D def show():

E print(msg)

Answer Key

Functions – Scope

Section A: Quick Questions

A — A variable created inside a function

B — A variable created outside all functions

B — NameError x doesn't exist outside func

A — 10

A — When the function finishes

Section B: Match the Pairs

def func(): x = 10 print(x) → Error: x is local, not visible outside

count = 0 def add_one(): count += 1 → Error: Can't modify global without 'global'

x = 5 def show(): print(x) show() → Valid: Read global inside function

count = 0 def add(): global count count += 1 → Ok: 'global' lets you modify it

def func(): y = 99 func() print(y) → Output: NameError

msg = 'Hi' def greet(): print(msg) greet() → Output: Hi

Section C: Definitions

Scope — Where a variable can be accessed - local or global.~~Local variable

Section D: Fill in the Blanks

def func():
    x = 5
# x is a local variable

x = 10
# x is a global variable
def func():
    print(x)

def func():
    y = 5

func()
print(y)
# causes NameError

x = 'outside'
def func():
    x = 'inside'
    print(x)
# prints 'inside'

def add(a, b):
    result = a + b
    return result

Section E: Spot the Error

D — x is local to func it can't be accessed outside. Print inside the function.

E — x is local and dies when func ends. Use return to get the value out.

E — result is local to add. Return the value and store it outside.

C — The local name inside change doesn't affect the global name. Use return.

E — msg is local to greet show can't see it. Pass it as a parameter.