What's the difference between 'int?' and 'int' in C#?

Question

I am 90% sure I saw this answer on stackoverflow before, in fact I had never seen the \"int?\" syntax before seeing it here, but no matter how I search I can\'t find the pre

Answer 1

int belongs to System.ValueType and cannot have null as a value. When dealing with databases or other types where the elements can have a null value, it might be useful to check if the element is null. That is when int? comes into play. int? is a nullable type which can have values ranging from -2147483648 to 2147483648 and null.

Reference: https://msdn.microsoft.com/en-us/library/1t3y8s4s.aspx