How to apply variable quantity in prompt?

Question

Prompt using variable quantity with if else

Answer 1

Have a search for an idea 😉

https://www.sololearn.com/discuss/1223924/?ref=app
https://www.sololearn.com/discuss/1752594/?ref=app
https://www.sololearn.com/discuss/1651121/?ref=app

Answer 2

A = prompt()
B = parseInt(A)