how to turn javascript ternary into a function code example

Example 1: javascript ternary operator

//ternary operator example:
var isOpen = true; //try changing isOpen to false
var welcomeMessage  = isOpen ? "We are open, come on in." : "Sorry, we are closed.";

Example 2: using ternary operator in javascript

// program to check pass or fail

let marks = prompt('Enter your marks :');

// check the condition
let result = (marks >= 40) ? 'pass' : 'fail';

console.log(`You ${result} the exam.`);