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Details

• Difficulty: 2/5

Check if a value is classified as a boolean primitive. Return true or false.

Boolean primitives are true and false.

Remember to use Read-Search-Ask if you get stuck. Try to pair program. Write your own code.

Useful Links

• Boolean Objects

Problem Script:

function boo(bool) {
  // What is the new fad diet for ghost developers? The Boolean.
  return bool;
}

boo(null);

Problem Explanation:

• This program is very simple, the trick is to understand what a boolean primitive is. The programs requires a true or false answer.

Hint: 1

• You will need to check for the type of the parameter to see if it is a boolean.

Hint: 2

• To check for the type of a parameter, you can use typeof

Hint: 3

• Since you must return true or false you can use if statements or just have it return the boolean used for the if statement.

Spoiler Alert!

Solution ahead!

Code Solution:

function boo(bool) {
  // Uses the operator typeof to check if is a boolean
  // if yes then return true, if it is another type then return false
  return typeof bool === 'boolean';
}

Code Explanation:

• Read comments on code.