arrow function javascript

                                    // an arrow function is also called a lambda or an anonymous function

let myFunction = () => {
  // some logic
}

                                    //If body has single statement
let myFunction = (arg1, arg2, ...argN) => expression

//for multiple statement
let myFunction = (arg1, arg2, ...argN) => {
    statement(s)
}
//example
let hello = (arg1,arg2) => "Hello " + arg1 + " Welcome To "+ arg2;
console.log(hello("User","Grepper"))
//Start checking js code on chrome inspect option

                                    // Traditional Function
function bob (a){
  return a + 100;
}

// Arrow Function
let bob = a => a + 100;

                                    // Traditional Function
function (a, b){
  let chuck = 42;
  return a + b + chuck;
}

// Arrow Function
(a, b) => {
  let chuck = 42;
  return a + b + chuck;
}

                                    const suma = (num1, num2) => num1+num2
console.log(suma(2,3));
//5

                                    ([a, b] = [10, 20]) => a + b;  // result is 30
({ a, b } = { a: 10, b: 20 }) => a + b; // result is 30

                                    
///////
//JavaScript Function Declarations
///////

//4th (arrow function)
hello4 = (name) => { return ("Hello " + name); }
    //OR
hello5 = (name) => { return (`Hello new ${name}`) }

//1st (simple function)
function hello1() {
    return "Hello simple function";
}

//2nd (functino expression)
hello2 = function() {
    return "Hello functino expression";
}

// 3rd ( IMMEDIATELY INVOKED FUNCTION EXPRESSIONS (llFE))
hello3 = (function() {
    return "Hello IMMEDIATELY INVOKED FUNCTION EXPRESSIONS (llFE)";
}())

                                    params => ({foo: "a"}) // returning the object {foo: "a"}

                                    /* Answer to: "arrow function javascript" */

// Single-line:
let testingFunc(string) => string == "Test" ? "Success!" : "Failure!";
console.log(testingFunc("test")); // "Failure!"

// Multi-line:
let arrowFunc(string) => {
  if (string = "test") {
    return "Success!";
  }
    return "Failure!";
  }
};
console.log(testingFunc("Test")); // "Success!"

/*
  Arrow functions in JavaScript are like regular functions except they look
  look nicer (imo) and there's single-line version of it which implicitly
  returns.
  
  Here's a guide showing the differences between the two:
  https://medium.com/better-programming/difference-between-regular-functions-and-arrow-functions-f65639aba256
  > The link will also be in the source below.
*/