Functions – Return Values
Name:
Date:
Class:
A
Quick Questions
Shade in the A or B circle for each question.
1. Does return send a value back out of a function?
2. Does return end the function's execution at that point?
3. Can a returned value be stored in a variable?
4. Must 'return' be written in lowercase?
5. Is 'retrun' a valid spelling of the keyword?
B
Match the Pairs
Draw a line connecting each item on the left to its match on the right.
| Left column | Right column | |
|---|---|---|
| 1return a + b; | AStores the value returned by add() in total | |
| 2let total = add(2, 3); | BWrong - 'return' must be lowercase | |
| 3Ends a function's execution and sends back a value | Creturn | |
| 4Sends back the square of a number | DSends the sum of a and b back out of the function | |
| 5Retrun a + b; | EWrong - 'return' is misspelled | |
| 6Return a - b; | Freturn n * n; |
C
Definitions
return
D
Fill in the Blanks
Complete each line of code by filling in the missing parts.
1.
______ a + b;
2.
let total _ add(2, 3);
3.
______ x * y;
4.
function square(n) {
______ n * n;
}
5.
let result _ square(4);
E
Spot the Error
Shade in the letter of the line that contains an error.
Question 1
A
function add(a, b) {
B
Return a + b;
C
}
Question 2
A
function sub(a, b) {
B
retrun a - b;
C
}
Question 3
A
console.log("mult");
B
function mult(x, y) {
C
return x * y
D
}
Question 4
A
function square(n) {
B
return n * n;
C
]
Question 5
A
function greet() {
B
return "Hi";
C
}
D
let msg = greet()
Answer Key
Functions – Return Values
Section A: Quick Questions
Q1
A — Yes
Q2
A — Yes
Q3
A — Yes
Q4
B — Yes
Q5
B — No
Section B: Match the Pairs
Q1
return a + b; → Sends the sum of a and b back out of the function
Q2
let total = add(2, 3); → Stores the value returned by add() in total
Q3
Ends a function's execution and sends back a value → return
Q4
Sends back the square of a number → return n * n;
Q5
Retrun a + b; → Wrong - 'return' is misspelled
Q6
Return a - b; → Wrong - 'return' must be lowercase
Section C: Definitions
Q1
return — Sends a value back out of a function and ends its execution at that point.Section D: Fill in the Blanks
Q1
return a + b;Q2
let total = add(2, 3);Q3
return x * y;Q4
function square(n) {
return n * n;
}Q5
let result = square(4);Section E: Spot the Error
Q1
B — 'return' must be lowercase - a capital R causes an error.
Q2
B — 'return' is misspelled as 'retrun'.
Q3
C — This line is missing a semicolon, but that's not required in JS.
Q4
C — The block must close with }, not ].
Q5
D — This line is missing a semicolon, but that's not required in JS.