what is the meaning of this return, (arr[0] < arr[1] && restArray), plz explain the process of excuting

Question

return (arr[0] < arr[1] && restArray)

Answer 1

What is <restArray>? no info about that variable. In fact, any of those variables.

Please provide more of the code for better context clariry, and tag a language name related to your question, not your own name ... ☝

https://code.sololearn.com/W3uiji9X28C1/?ref=app