arrow function rec
(param1, param2, …, paramN) => { statements }
(param1, param2, …, paramN) => expression
// equivalent to: => { return expression; }
// Parentheses are optional when there's only one parameter name:
(singleParam) => { statements }
singleParam => { statements }
// The parameter list for a function with no parameters should be written with a pair of parentheses.
() => { statements }arrow function javascript
///////
//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)";
}())arrow function javascript
// Normal Function in JavaScript
function Welcome(){
console.log("Normal function");
}
// Arrow Function
const Welcome = () => {
console.log("Normal function");
}javascript arrow function
// Non Arrow (standard way)
let add = function(x,y) {
return x + y;
}
console.log(add(10,20)); // 30
// Arrow style
let add = (x,y) => x + y;
console.log(add(10,20)); // 30;
// You can still encapsulate
let add = (x, y) => { return x + y; };js arrow function
// const add = function(x,y) {
// return x + y;
// }
// const add = (x, y) => {
// return x + y;
// }
const add = (a, b) => a + b;
const square = num => {
return num * num;
}
// const rollDie = () => {
// return Math.floor(Math.random() * 6) + 1
// }
const rollDie = () => (
Math.floor(Math.random() * 6) + 1
)arrow functions javascript
// Traditional Function Expression
var add = function(a,b){
return a + b;
}
// Arrow Function Expression
var arrowAdd = (a,b) => a + b;Copyright © 2021 Codeinu
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