// Arrow function with two arguments const sum = (firstParam, secondParam) => {   return firstParam + secondParam; }; console.log(sum(2,5)); // Prints: 7  // Arrow function with no arguments const printHello = () => {   console.log('hello'); }; printHello(); // Prints: hello // Arrow functions with a single argument const checkWeight = weight => {   console.log(`Baggage weight : ${weight} kilograms.`); }; checkWeight(25); // Prints: Baggage weight : 25 kilograms.  // Concise arrow functionsconst multiply = (a, b) => a * b; console.log(multiply(2, 30)); // Prints: 60