Answers for "using typeof"

javascript find type of variable

> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"

if(typeof bar === 'number') {
   //whatever
}

type of javascript

//typeof() will return the type of value in its parameters.
//some examples of types: undefined, NaN, number, string, object, array

//example of a practical usage
if (typeof(value) !== "undefined") {//also, make sure that the type name is a string
  	//execute code
}

check data type in js

typeof("iAmAString");//This should return 'string'
//NO camelCase, as it is a JS Keyword

JS function typeof

function fortyTwo() {
  return 42;
}

typeof fortyTwo; // "function"
typeof fortyTwo(); // "number"