Arrow Functions (ES6)

#With two arguments

const sum = (param1, param2) => { 
  return param1 + param2; 
}; 
console.log(sum(2,5)); // => 7 

#With no arguments

const printHello = () => { 
  console.log('hello'); 
}; 
printHello(); // => hello

#With a single argument

const checkWeight = weight => { 
  console.log(`Weight : ${weight}`); 
}; 
checkWeight(25); // => Weight : 25 

#Concise arrow functions

const multiply = (a, b) => a * b; 
// => 60 
console.log(multiply(2, 30)); 

Arrow function available starting ES2015