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Arrow Function

Arrow Function is used to create functions in a cleaner way compared to regular functions. This Function is introduced in the ES6 version of JavaScript.

Difference Between Normal Function and Arrow Function

  1. Arrow Function is like the Shortcut for Creating Normal Function.
  2. In Arrow Function code looks cleaner as compared to Normal Function.

Syntax

We will Compare the syntax of both function Normal Function and Arrow Function

Normal Function :

function functionName(parameters){ //statements return variableName; } var returnedValue = functionName(parameters);

Arrow Funtion:

let returnedValue = (parameters) => { // statements return variableName; }

Here,

We have Created a variable with name returnedValue and parsing parameters in place of parameters and variableName is the Returned Value.

Lets See Some Examples To make it clear.

Example

Lets Make a program that calculates the percentage of 5 Marks out of 100.

First in Normal Function :

function calcPercentage(m1,m2,m3,m4,m5){ let result = ((m1+m2+m3+m4+m5)/500) * 100; return result; } var result = calcPercentage(98,95,90,94,85); console.log(result);

Now do it with Arrow Function :

let myfunc = (m1,m2,m3,m4,m5) => ((m1+m2+m3+m4+m5)/500)*100 var result = myfunc(98,95,90,94,85); console.log(result);

Here,

We have created a let variable, and have Defined function in it.

We are sending 4 Variables m1, m2 , m3 , m4 , m5

Then, we have used formula to calculate the percentage : ((sum of all marks / Total Marks)*100)

The value of result will be printed in Console Tab.