Can't parse this int

Question

I got a simple question, I got error when I do: I can't convert it to int...

string buy = "16.11";
int _buy = (int.Parse(buy) * 9);

Answer 1

Int stands for Integer. You can't parse delimited value to int. Change it to double or decimal. For example:

string buy = 16.11;
double _buy = double.Parse(buy) * 9;

Answer 2

Well, 16.11 is a float number , so you have to parse into, say, Double and the round up to int :

string buy = "16.11";
int _buy = (int)(Double.Parse(buy) * 9 + 0.5); // 0.5 for rounding up

if _buy is actually a float or decimal , treat it as being float or decimal

 string buy = "16.11";
 // We usually use Decimal for money
 Decimal _buy = Decimal.Parse(buy) * 9;

Answer 3

A string variable cannot hold a decimal value, your string initialization is also wrong, you can do like the following, a string should be within double quotes, or else you should add .ToString() :

string buy = "16.11";
int _buy = (int)(Double.Parse(buy) * 9 + 0.5);