function declaration and function definition in javascript
//Function declarations load
//before any code is executed
//while
//Function expressions load
//only when the interpreter reaches that line of code.
//eg.
add(1,2);
function add(a,b){ //this is a function declaration
return a+b;
}
sum(1,5); //this is a function expression will throw initialization error
const sum = () => a+b; //function expression is strored in variabledeclare function javascript
function myFunction(var1, var2) {
return var1 * var2;
}javascript function
// variable:
var num1;
var num2;
// function:
function newFunction(num1, num2){
return num1 * num2;
}javascript function declaration
//Four ways to declare a function
function add(a, b) {
return a + b;
}
var add = function(a, b) {
return a + b;
}
var add = (a, b) => {
return a + b;
}
var add = (a, b) => a + b;function declaration javascript
//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)";
}())
//4th (arrow function)
hello4 = (name) => { return ("Hello " + name); }
//OR
hello5 = (name) => { return (`Hello new ${name}`) }
document.getElementById("arrow").innerHTML = hello4("arrow function");
document.write("<br>" + hello5("arrow function"));Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
