Return values in Javascript - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the return statement do in a JavaScript function?

It stops the function and sends a value back to where the function was called.

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Can a JavaScript function return more than one value directly?

No, a function returns only one value. But you can return an object or array to hold multiple values.

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What happens if a function does not have a return statement?

The function returns undefined by default.

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How do you capture the value returned by a function?

You assign the function call to a variable, like <code>let result = myFunction();</code>

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What is the difference between console.log() and return in a function?

console.log() shows output on the screen but does not send a value back. return sends a value back to the caller.

What does a return statement do inside a function?

A Stops the function and sends a value back

B Prints a value to the console

C Starts the function

D Declares a variable

The return statement stops the function and sends a value back to where it was called.

What value does a function return if it has no return statement?

A null

B 0

C undefined

D false

Functions without a return statement return undefined by default.

How can you return multiple values from a function?

A You cannot return multiple values

B Use multiple <code>return</code> statements

C Return a string with all values

D Return an array or object containing the values

You can return an array or object to hold multiple values from a function.

Which of these captures the returned value from a function?

A let x = myFunction()

B console.log(myFunction())

C return myFunction()

D function myFunction()

Assigning the function call to a variable captures the returned value.

What is the difference between return and console.log()?

A <code>return</code> prints output, <code>console.log()</code> sends value back

B <code>return</code> sends value back, <code>console.log()</code> prints output

C Both do the same thing

D Neither sends value back

return sends a value back to the caller; console.log() only prints to the console.

Explain what the return statement does in a JavaScript function and why it is useful.

Think about how functions give you answers.

Describe how you can return multiple values from a function in JavaScript.

Imagine putting things in a box to carry them all at once.