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

• Boolean

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

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

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

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Solution ahead!

function booWho(bool) {
  return typeof bool === 'boolean';
}

// test here
booWho(null);

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Uses the operator typeof to check if the variable is a boolean. If it is, it will return true. Otherwise, if it is any other type it will return false.

• Using typeof
• typeof

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Thanks @Rafase282 for your help with Algorithm: Boo-who

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