Folks, I installed the node normally and added to the environment variable; I did some math to test and it worked. When I tried to install modules (socket.io and express) it did not work, even running as administrator. I tried to check the command to test if npm is installed, but I get an error in return. The command was to check the version of npm: npm -v and this also did not work with node even if it is installed and working: node -v .
You are only running in the wrong place your command. The npm is the Node Package Manager , you do not need to "start" the node ( node + enter on your console ) to use it.
Open command and type npm -v directly on the command line.
C:\Users\pfortesc>npm -v
2.14.4
As explained by @Sergio, the way you were doing node was trying to find the variable npm , since it does not exist, the exception was thrown.
You are running in node mode and it should not be this way.
When you only write node you enter a JavaScript mode, ie you are in a JavaScript console. Then when you type npm it will interpret as a JavaScript variable and says it is not defined ...
Use directly on the console:
$ npm -v
$ # ou
$ node -v
node and npm are two separate programs, and you were trying to run npm from within node , which clearly would not work. That is, you just run npm as a normal command in Windows Command Prompt.
Instead of doing this:
C:\Users\zignd>node
> npm -v
ReferenceError: npm is not defined
at repl:1:1
at REPLServer.defaultEval (repl.js:132:27)
at bound (domain.js:254:14)
at REPLServer.runBound [as eval] (domain.js:267:12)
at REPLServer.<anonymous> (repl.js:279:12)
at REPLServer.emit (events.js:107:17)
at REPLServer.Interface._onLine (readline.js:214:10)
at REPLServer.Interface._line (readline.js:553:8)
at REPLServer.Interface._ttyWrite (readline.js:830:14)
at ReadStream.onkeypress (readline.js:109:10)
Do this:
C:\Users\zignd>npm -v
2.10.1