f string javascript

const age = 3
console.log(`I'm ${age} years old!`)//

const firstName = 'john';
const lastName = 'smith';

const output = `name: ${firstName}, surname: ${lastName}`;
// name: john, surname: smith`string text ${expression} string text``string text`

`string text line 1
 string text line 2`

`string text ${expression} string text`

tag `string text ${expression} string text`
`string text`

`string text line 1
 string text line 2`

`string text ${expression} string text`

tag`string text ${expression} string text`