---
title: Installation
---
## Installation
To get started yourself, the two things you will need are the TypeScript compiler and a editor that supports TypeScript.
In the above screenshot, I'm installing both the compiler and TSLint (which is similar to ESLint) using `npm` in Visual Studio Code’s integrated terminal.
### Installing TypeScript
This command will install the TypeScript package as a dependency in your project using `npm` which is a popular package manager.
```bash
npm i typescript
```
*To Note* There are several options that `npm` provides depending on where you want TypeScript installed.
- `npm i -g typescript` to globally install the TypeScript package
- `npm i -D typescript` to install the TypeScript package as a dev dependency
### TSLint
See how to setup linting options for TypeScript at [TypeScript](./) > [Linter](./linter) within the **freeCodeCamp Guide**.
### Compiling a single file down to JavaScript
```bash
tsc multiplication.ts
```
*To Note* You can configure this TypeScript compilation process as a custom npm script in your `package.json`.
### Configuration Options
```bash
touch tsconfig.json
```
There’s also the option to create a `tsconfig.json` file that specifies the root files and compiler options.
Within your `tsconfig.json` file, for example, you could specify that you want TypeScript to compile down to ES5 instead of ES6.
### Quick Example
In the screenshot above, you can see two files - `multiplication.js` and `multiplication.ts`.
This program just prints out the product of two numbers I’ve pre-defined.
> `multiplication.ts`
```typescript
let a: number = 10;
let b: number = 2;
function showProduct(first: number, second: number): void {
console.info("Mathematical! The result is " + first * second + ".");
}
showProduct(a, b);
// Mathematical! The result is 20.
```
Once I've finished creating `multiplication.ts`, I can compile it down to JavaScript using the `tsc` command which stands for TypeScript compile.
> `multiplication.js`
```javascript
var a = 10;
var b = 2;
function showProduct(first, second) {
console.info("Mathematical! The result is " + first * second + ".");
}
showProduct(a, b);
// Mathematical! The result is 20.
```
Bam - I just successfully compiled TypeScript to JavaScript!