Node.js lessc not defined

I want to server-side compiling my less files into css. I read, that it is possible via Node.js. I have installed Nodes.js (.msi file) on my computer and run Node.js, than I type into Node.js command

lessc - help

but it gives me an error "lessc is not defined".

Could you someone help me with this problem?

Thanks.

windows
node.js
less

You're in the node.js REPL which is only for executing javascript code. Instead you need to do npm install less -g at your command prompt and then try using lessc from your command prompt.