var n = 200
undefined
n
200
typeof n
"number"
n = "Google"
"Google"
typeof n
"string"
typeof 6
"number"
typeof 6.5
"number"
typeof "6.5"
"string"
typeof []
"object"
typeof {}
"object"
typeof function(){}
"function"
typeof undefined
"undefined"
typeof NaN
"number"
typeof infinity
"number"
typeof null
"object"
