1//If body has single statement
2let myFunction = (arg1, arg2, ...argN) => expression
3
4//for multiple statement
5let myFunction = (arg1, arg2, ...argN) => {
6    statement(s)
7}
8//example
9let hello = (arg1,arg2) => "Hello " + arg1 + " Welcome To "+ arg2;
10console.log(hello("User","Grepper"))
11//Start checking js code on chrome inspect option

1/* Answer to: "arrow function javascript" */
2
3// Single-line:
4let testingFunc(string) => string == "Test" ? "Success!" : "Failure!";
5console.log(testingFunc("test")); // "Failure!"
6
7// Multi-line:
8let arrowFunc(string) => {
9  if (string = "test") {
10    return "Success!";
11  }
12    return "Failure!";
13  }
14};
15console.log(testingFunc("Test")); // "Success!"
16
17/*
18  Arrow functions in JavaScript are like regular functions except they look
19  look nicer (imo) and there's single-line version of it which implicitly
20  returns.
21  
22  Here's a guide showing the differences between the two:
23  https://medium.com/better-programming/difference-between-regular-functions-and-arrow-functions-f65639aba256
24  > The link will also be in the source below.
25*/

1// an arrow function is also called a lambda or an anonymous function
2
3let myFunction = () => {
4  // some logic
5}

1params => ({foo: "a"}) // returning the object {foo: "a"}

1// Traditional Function
2function (a, b){
3  let chuck = 42;
4  return a + b + chuck;
5}
6
7// Arrow Function
8(a, b) => {
9  let chuck = 42;
10  return a + b + chuck;
11}

1hello4 = (name) => { return ("Hello " + name); }
2    //OR
3hello5 = (name) => { return (`Hello new ${name}`) }
4
5
6document.getElementById("arrow").innerHTML = hello4("arrow function");
7
8document.write("<br>" + hello5("arrow function"));

1// Traditional Function
2function (param) {
3  var a = param * 3;
4  return a;
5}
6
7//Arrow Function
8(a, b) => {
9  let c = (a * b) + 3;
10  return c;
11}

1([a, b] = [10, 20]) => a + b;  // result is 30
2({ a, b } = { a: 10, b: 20 }) => a + b; // result is 30
3

1const power = (base, exponent) => {
2  let result = 1;
3  for (let count = 0; count < exponent; count++) {
4    result *= base;
5  }
6  return result;
7};
8
9//if the function got only one parameter
10
11const square1 = (x) => { return x * x; };
12const square2 = x => x * x;
13
14// empty parameter
15
16const horn = () => {
17  console.log("Toot");
18};

1hello = () => {
2  return "Hello World!";
3}