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();

Answer 2

You use kacbegen as a string. Please use as a integer use parseInt(kacbegen) + 1

Answer 3

Convert it to number via adding a +:

var toplam = (+kacbegen + 1);

Unary plus (+)

The unary plus operator precedes its operand and evaluates to its operand but attempts to converts it into a number, if it isn't already.

Answer 4

You need to use parseInt to convert kacbegen, which is a String instance, to a Number:

var begen = $(this).attr('id');
var kacbegen = $("#math" + begen).text();
var toplam = (parseInt(kacbegen) + 1);

alert(toplam);

The + operator, when used with a String on either side, will serve as a concatenation, calling Number.prototype.toString on 1.

Answer 5

You need to cast the contents to a number:

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