difference between ?. and !. typescript code example

Example 1: typescript vs javascript

They are really almost the same theres not the same param types like
JAVASCRIPT is function myFunction(param)
while typescript is
function myFunction(the_param: something)

Example 2: typescript vs javascript

// What differs typescript from javascript is the strict usage of types.
// Javascript is a loosely typed language, 
// while Typescript is strictly typed.

// Javascript
let car = 'BMW';
let age = 15;

// Typescript
let car: string = 'BMW';
let age: number = 15;