Why does this promise chain print undefined?

programming web dev
1

Consider this snippet.

Promise.resolve(1)
  .then((v) => { v + 1; })
  .then((v) => console.log(v));

Why does this print undefined, and what one-line change fixes it.

Hari :slightly_smiling_face:

2

It prints undefined because the first then callback uses braces but does not return, so change it to .then(v => v + 1) or add return v + 1. inside the braces.

BobaMilk