Typeof.md

    typeof(1)           -Number
    typeof(1.1)         -Number
    typeof('1.1')       -String
    typeof(true)        -Boolean
    typeof(null)        -Object
    typeof(undefined)   -Undefined
    typeof([])          -Object
    typeof({})          -Object
    typeof(NaN)         -Number.
    
    Sir As you said I tried this in console and got clear understanding. Here we are getting to know the type of data which is present inside the brackets.