Why is Int32's maximum value 0x7FFFFFFF?

Question

I saw in MSDN documents that the maximum value of Int32 is 2,147,483,647, hexadecimal 0x7FFFFFFF.

I think, if it\'s Int32 it should store 32-bi

Answer 1

The first bit is the sign - an int32 is signed, i.e. it can be positive/negative (well I probably shouldn't say 'first' bit!)