Level 75
Level 77
10 words 0 ignored
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Ignore words
Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.
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Returns string
typeof "John"
Returns number
typeof 3.14
Returns number
typeof NaN
Returns boolean
typeof false
Returns object
typeof [1,2,3,4]
Returns object
typeof {name:'John', age:34}
Returns object
typeof new Date()
Returns function
typeof function () {}
Returns undefined
typeof myCar (myCar is not declared)
Returns object
typeof null
