Why my number is converted into string in JavaScript

Question

I want to know why my code is not working properly instead of adding they showing the numbers ?
https://code.sololearn.com/W6vheWg1326o/?ref=app

Answer 1

Parse to Number like this:

https://code.sololearn.com/WJ5l09dykE09/?ref=app

Answer 2

Thanks for your answer

Answer 3

you got string value. try convert input to number with unary operator +prompt1 and +prompt2