Merge pull request #407 from snakecase/patch-3

Add a hint for empty input and pressing ESC during prompts

Author: iliakan

1-js/02-first-steps/10-ifelse/4-check-login/task.md

@@ -20,4 +20,6 @@ The schema:
 
 Please use nested `if` blocks. Mind the overall readability of the code.
 
+Hint: passing an empty input to a prompt returns an empty string `''`. Pressing `key:ESC` during a prompt returns `null`.
+
 [demo]