Different ways to create a function in javascript

Different ways to create a function in javascript

In this chapter, you will learn about different ways to create a function in javascript. This chapter helps you to understand how many ways we can create a function in Javascript. We can create the function in Javascript in different ways. Let’s look at the below examples

Different ways to create a function in Javascript:
Function declaration:

The function declaration approach created a regular function, the function starts with the keyword function followed by function name.

// function declaration
function fullNameByDec(firstName, lastName) {
    return firstName + ' '+ lastName;
}
console.log(fullNameByDec('John','Mickel'));

// output
// John Mickel

Function expression:

// function expression
const fullNameByExp = function(firstName, lastName) {
    return firstName + ' '+ lastName;
}
console.log(fullNameByExp('John','Mickel'));

// output
// John Mickel

Arrow function:

// function
const fullNameByArrow = (firstName, lastName) => {
    return firstName + ' '+ lastName;
}
console.log(fullNameByArrow('John','Mickel'));

// output
// John Mickel