What Is the function of JavaScript?
Functions are one of the fundamental building
blocks in JavaScript. A function is a JavaScript procedure - a set of
statements that performs a task.
To use functions, you must define or declared in
the scope from which you wish to call it.
Functions are declared or defined with the
function keyword. You can write a
function in four ways and it looks like..
JavaScript Functions 4 Ways -
1. Function
Declaration
2. Function
Expression
3. Arrow
Function Expression
4. Concise
Arrow Function expression
Example -
//Way-1
//Function Declaration
function
fn1_Square(a,
b){
let square
= a*b;
return square;
}
//Way-2
//Function Expression
const
fn2_Square = function(a,b){
let square
= a*b;
return square;
}
//Way-3
//Arrow Function Expression
const
fn3_square = (a,
b) =>
{
let square
= a*b;
return square;
}
//Way-4
//Concise Arrow Function Expression
const
fn4_square = (a,b)
=> a*b;
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Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..
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