js template string
// string literals ('') and ("").
const greeting1 = "Hello";
console.log(greeting1 + " World!");
// template string (``).
const greeting2 = "Hey";
console.log(`${greeting2} World!`);
// the cool thing about string literals is that you can write expressions inside them.
const num1 = 10;
const num2 = 34;
// ${num1 + num2} or any other calculation work well with template literals
console.log(`the result of ${num1} + ${num2} = ${num1 + num2}.`);