what does typeof mean in javascript code example

Example 1: js typeof number

console.log(typeof 93);
// Output = "number"

console.log(typeof 'Maximum');
// Output = 'string'

console.log(typeof false);
// Output = "boolean"

console.log(typeof anUndeclaredVariable);
// Output = "undefined"

Example 2: typeof in js

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

Example 3: typeof javascript

console.log(typeof 'blubber');