index.js

const myFunc = (greetings,name) => `${greetings()}, ${name}! `;
const hello = () => "Hello"
const bonjour = () => "Bonjour"
const salut = () => "Salut"

const result_1 = myFunc(hello,"Rahul");
const result_2 = myFunc(bonjour,"Rahul");
const result_3 = myFunc(salut,"Rahul");

console.log(result_1);
console.log(result_2);
console.log(result_3);
// Output: 
// Hello, Rahul! 
// Bonjour, Rahul! 
// Salut, Rahul!