Comparison numbers in Javascript

Question

https://code.sololearn.com/W7kOWHT32RWq/?ref=app Why is the number 30. greater than the number 30?

Answer 1

Because you are comparing string, not numbers, and they are compared based on their char code value (so "5" > "51" but 5 < 51).
You need to cast your inputs to number, either explicitly or implicitly, with the use of parseFloat (or parseInt: explicit) or an implicit cast:
var x = "42";
console.log(typeof x); // string
x = +x;
console.log(typeof x); // number
There are few differences between implicit and explicit methods, but in major cases, you could use any of them ;)