| C# Datatype | Bytes | Range |
|---|---|---|
| byte | 1 | 0 to 255 |
| sbyte | 1 | -128 to 127 |
| short | 2 | -32,768 to 32,767 |
| ushort | 2 | 0 to 65,535 |
| int | 4 | -2 billion to 2 billion |
| uint | 4 | 0 to 4 billion |
| long | 8 | -9 quintillion to 9 quintillion |
| ulong | 8 | 0 to 18 quintillion |
| float | 4 | 7 significant digits1 |
| double | 8 | 15 significant digits2 |
| object | 4 byte address | All C# Objects |
| char | 2 | Unicode characters |
| string | 4 byte address | Length up to 2 billion bytes |
| decimal | 24 | 28 to 29 significant digits3 |
| bool | 2 | true, false |
The range of an unsigned integer of size n bytes is 0 to 28n - 1.
The range of a signed integer of size n bytes is -28n-1 to 28n-1 - 1.
1For the float datatype, positive values
are
1.4 x 10-45 to
3.4 x 1038.
Negative values are
-3.4 x 1038 to
-1.4 x 10-45.
2For the decimal datatype, positive values
are 4.9 x 10-324 to
1.8 x 10308.
Negative values are
-1.8 x 10308 to
-4.9 x 10-324
3For the decimal datatype, positive values are
1.0 x 10-28 to
7.9 x 1028.
Negative values are
-7.9 x 1028 to
-1.0 x 10-28.