Using Arrow Function in Javascript Basic Guideline

Arrow Function : In Javascript this is special form of function expression.You dont need to write function keyword.

// Simple arrow function in JS

const age = (birthYear) => 2021 - birthYear ;
const displayAge = age(1990);
console.log(displayAge);

// Calculate Retirement Age Using Arrow Function

const retirementCalc = (birthYear, firstName) => {
const age = 2021 - birthYear;
const retirement = 65 - age;
return `${firstName} will be retire in ${retirement} Years`;
}

console.log(retirementCalc(1975, 'Anil'));
console.log(retirementCalc(1990, 'Sumit'));