//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
}if (typeof i != "number") {
console.log('This is not 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"typeof("iAmAString");//This should return 'string'
//NO camelCase, as it is a JS Keyword> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"var x = "Hello World";
typeof x; // "string"