Anil Singh | Code-sample.com

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 ;   ...