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c#integermaxoverflowmin

overflow of the integer type in C#

In the C# language, the maximum and the minimum value that the int type could maintain in itself are -2,147,483,648 to 2,147,483,647.

Why if we add 2 units to the maximum value, the compiler does not show any errors?

It just shows the -2,147,483,646, which is negative and two units larger than the minimum value the int type can save.

Solution

  • It behaves as towards the circle.

    You choose one place to start (it is black line here). Then you are going to make a full circle and then you will reach maximum of its size.

    Now, instead of having a problem you will start the same circle again(blue line are those 2 numbers) and that is the reason why you move to negative numbers after reaching a maximum of positive.

    1

    This can cause many problems, so it is the best to make some if-else(or something else) to secure your program.

    Here is your example.
    When we add something this happens: 2,147,483,647 -> -2,147,483,648 -> -2,147,483,647 ...

    If you have used unsigned int and tried to decrease them(4,3,2,1,0 ..) then instead of moving to negative numbers you would move to a maximum value which is 4,294,967,295

    Edit:

    It is runtime behaviour

    Credits to Klaus (look comments).