How do I get a proper response for a user's input?

Question

How would I go about having a page respond to a user's input?
Say they input "a1". I want them to get "Dog" as a response. I tried having code read:
var input=prompt()
If (input==a1){
alert(dog)
}
But it says I haven't defined a1, which okay but simply adding a variable as a1 doesn't do anything. I cant imagine how giving a1 any value would fix anything. Any thoughts?

Answer 1

Monkey Jesus , if you want to check if input equals to certain string => "a1", you can achieve it for example this way. Hope it helps you 🐱
https://code.sololearn.com/W9MAK3KPNBJe/?ref=app

Answer 2

Found that I can give each answer a unique number value, which makes it work fine. Though, if there's other better ways to do this please let me know.