Node.js console.log throws me undefined

Question

 var sys = require("util");

When I try to run this code in the console, I get undefined

as output. Even the below expression is throwing undefined for me at runtime.

 console.log("Hello World");

Output

 Hello World
 Undefined

Are we going to build our own server and write code with node.js?

+3

javascript node.js

theJava 20 Mar 12 at 10:19

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1 answer

Anatoliy · Accepted Answer · 2012-03-20T11:17:20+0000

The latter undefined

is the result returned by the console.log method:

node
> console.log('hey')
hey
undefined
>

As you can see, at first "hey" is printed console.log, but console.log returns undefined as a result of the operation and is printed to output.