Why i get undefined output in the node.js terminal?

Question

Working on new node.js.
Code:
Var a='oops';
Console.log(console.log(a));
Output:
Oops
Undefined

.......................
WHY

Answer 1

`console.log` does not return anything.

https://developer.mozilla.org/en/docs/Web/API/Console/log

When you nest method calls like that, the inner most call is evaluated first, in this case `console.log(a)`, as a statement, be executed, which outputs value of <a> in the JS console.

The outer call to `console.log` expected something from its argument. BUT, since nothing was explicitly returned by the inner `console.log` call, the outer `console.log` call gets `undefined`