How to make 1 + 1 = 2 instead of 1 + 1 = 11 [duplicate]

Answer 1

It looks like you're working with Strings (and thus a + b is the concatenation operator) when you want to be working with Number (so x + y would be addition)

Perform your favorite way to cast String to Number, e.g. a unary +x

var kacbegen = +$("#math" + begen).text();