How can I check which version of Angular I'm using?

Question

How can I tell which version of Angular I am using?

I have tried:

angular --version
angular --v
angular -version
angular -v

but get

Answer 1

Edit: When this answer was written, there was only AngularJS 1.x. Look in the answers below for Angular versions >= 2.

AngularJS does not have a command line tool.

You can get the version number from the JavaScript file itself.

Header of the current angular.js:

/**
 * @license AngularJS v1.0.6
 * (c) 2010-2012 Google, Inc. http://angularjs.org
 * License: MIT
 */