Calling a function
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Does calling a function require its name followed by brackets containing arguments?
2. Should arguments in a function call be separated by commas?
3. Can the value returned by a function call be stored in a variable?
4. Should a function call with no arguments still include empty brackets?
5. Does a function call need to use square brackets, like myFunc[3, 4]?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1addNumbers(3, 4) | ACalling a function | |
| 2total ← addNumbers(3, 4) | BStores the value returned by a function call in a variable | |
| 3Writing a function's name followed by arguments in brackets | CCalling a function requires brackets around its arguments | |
| 4Values passed into a function call, matching the parameters it expects | DA function call uses round brackets, not square brackets | |
| 5total <- addNumbers 3, 4 | E(3, 4) | |
| 6size ← area[5, 3] | FCalls the addNumbers function with two arguments |
C
Definitions
addNumbers(3, 4)
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
total ← __________(3, 4)
2.
total ← addNumbers(_, _)
3.
result ← multiply(6, _)
4.
message ← greet("___")
5.
DISPLAY addNumbers(2, _)
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
define addNumbers(a, b)
B
return a + b
C
end function
D
total <- addNumbers 3, 4
Question 2
A
total <- addNumbers 3, 4
B
define addNumbers(a, b)
C
return a + b
D
end function
Question 3
A
define double(n)
B
return n * 2
C
end function
D
output = double(6)
Question 4
A
define computeArea(length, width)
B
size <- computeArea 5, 3
C
return length * width
D
end function
Question 5
A
define multiply(x, y)
B
answer <- multiply(3 4)
C
return x * y
D
end function
Answer Key
Calling a function
Section A: Quick Questions
Q1
A — True
Q2
B — True
Q3
A — True
Q4
B — True
Q5
A — False
Section B: Match the Pairs
Q1
addNumbers(3, 4) → Calls the addNumbers function with two arguments
Q2
total ← addNumbers(3, 4) → Stores the value returned by a function call in a variable
Q3
Writing a function's name followed by arguments in brackets → Calling a function
Q4
Values passed into a function call, matching the parameters it expects → (3, 4)
Q5
total <- addNumbers 3, 4 → Calling a function requires brackets around its arguments
Q6
size ← area[5, 3] → A function call uses round brackets, not square brackets
Section C: Definitions
Q1
addNumbers(3, 4) — Calling a function by writing its name followed by arguments in brackets, running its instructions and possibly producing a valueSection D: Fill in the Blanks
Q1
total ← addNumbers(3, 4)Q2
total ← addNumbers(3, 4)Q3
result ← multiply(6, 7)Q4
message ← greet("Sam")Q5
DISPLAY addNumbers(2, 5)Section E: Spot the Error
Q1
D — Calling a function requires brackets around the arguments, such as addNumbers(3, 4).
Q2
A — Calling a function requires brackets around the arguments, such as addNumbers(3, 4).
Q3
D — Assignment in pseudocode uses ←, not =.
Q4
B — Calling a function requires brackets around its arguments — it should read computeArea(5, 3).
Q5
B — Arguments in a function call must be separated by a comma, such as multiply(3, 4).