// Define a utility function that adds two numbers

const addNumbers = (a, b) => {

  return a + b;

}

​

// Then call it elsewhere

addNumbers(3, 8);

​

// Define a utility function that capitalizes the first letter of a string

const capitaliseString = (str) => {

  return str.charAt(0).toUpperCase() + str.slice(1);

}

​

// Then call it elsewhere

capitaliseString("hello there");

​

// Define a utility function that generates a random number between two values

const getRandomNumber = (min, max) => {

  return Math.floor(Math.random() * (max - min + 1) + min);

}

​

// Then call it elsewhere

getRandomNumber(2, 28563);