• anonymous functions -> have no function identifier (no name)
• can be stored in variables!
• use case: to pass functions into other functions we can use function expressions

const x = function (a, b) {
    return a * b
};
console.log(x(2,3));  // 6

• anonymous function is created and instead of stored in a variable directly evoked (called)

(function(a,b) {    // anonymous function
    return a+b      // adds 2 numbers
})(1,2);            // enclosed in () makes it self-evoking. 
                    // last () are here to pass parameters