Visual Basic type | Common language runtime type structure | Nominal storage allocation | Value range |
---|---|---|---|
Depends on implementing platform |
True or False |
||
1 byte |
0 through 255 (unsigned) |
||
Char (single character) |
2 bytes |
0 through 65535 (unsigned) |
|
8 bytes |
0:00:00 (midnight) on January 1, 0001 through 11:59:59 PM on December 31, 9999 |
||
16 bytes |
0 through +/-79,228,162,514,264,337,593,543,950,335 (+/-7.9...E+28) † with no decimal point; 0 through +/-7.9228162514264337593543950335 with 28 places to the right of the decimal; smallest nonzero number is +/-0.0000000000000000000000000001 (+/-1E-28) † |
||
Double (double-precision floating-point) |
8 bytes |
-1.79769313486231570E+308 through -4.94065645841246544E-324 † for negative values; 4.94065645841246544E-324 through 1.79769313486231570E+308 † for positive values |
|
4 bytes |
-2,147,483,648 through 2,147,483,647 (signed) |
||
Long (long integer) |
8 bytes |
-9,223,372,036,854,775,808 through 9,223,372,036,854,775,807 (9.2...E+18 †) (signed) |
|
Object (class) |
4 bytes on 32-bit platform 8 bytes on 64-bit platform |
Any type can be stored in a variable of type Object |
|
1 byte |
-128 through 127 (signed) |
||
Short (short integer) |
2 bytes |
-32,768 through 32,767 (signed) |
|
Single (single-precision floating-point) |
4 bytes |
-3.4028235E+38 through -1.401298E-45 † for negative values; 1.401298E-45 through 3.4028235E+38 † for positive values |
|
String (variable-length) |
String (class) |
Depends on implementing platform |
0 to approximately 2 billion Unicode characters |
4 bytes |
0 through 4,294,967,295 (unsigned) |
||
8 bytes |
0 through 18,446,744,073,709,551,615 (1.8...E+19 †) (unsigned) |
||
User-Defined (structure) |
(inherits from ValueType) |
Depends on implementing platform |
Each member of the structure has a range determined by its data type and independent of the ranges of the other members |
2 bytes |
0 through 65,535 (unsigned) |
Kilde: http://msdn.microsoft.com/en-us/library/47zceaw7%28v=vs.80%29.aspx