check type javascript

typeof("string"); //string
typeof(123); //number

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

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

if (typeof i != "number") {
    console.log('This is not number');
}

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

//example of a practical usage
if (typeof(value) !== "undefined") {//asuming value is already set
  	//execute code
}

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

console.log(typeof "how are you?")
"string"
console.log(typeof false) / console.log(typeof true)
"boolean"
console.log(typeof 100)
"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 operando

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

var x = "Hello World";
typeof x; // "string"