Sebagaimana bahasa pemrograman lainnya, Visual Basic menyediakan
berbagai type data yang dapat digunakan oleh pemrogram sesuai dengan konteks
pemakaiannya. Type data pada Visual Basic dibagi atas dua kelompok besar yaitu
Value Type (Tipe data primitif) dan Reference (String, Array dan Objek).
Berikut ini adalah tabel tipe data pada VB disertai dengan alokasi
storage yang dibutuhkan serta jangkauan nilai yang dapat ditampung oleh
masing-masing tipe.
Visual Basic
type
|
Common language
runtime type structure
|
Nominal storage
allocation
|
Value range
|
Boolean
|
System.Boolean
|
2 bytes
|
True or False.
|
Byte
|
System.Byte
|
1 byte
|
0 through 255 (unsigned).
|
Char
|
System.Char
|
2 bytes
|
0 through 65535 (unsigned).
|
Date
|
System.DateTime
|
8 bytes
|
0:00:00 on January 1, 0001 through 11:59:59 PM on December 31, 9999.
|
Decimal
|
System.Decimal
|
16 bytes
|
0 through +/-79,228,162,514,264,337,593,543,950,335 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) |
System.Double
|
8 bytes
|
-1.79769313486231570E+308 through
-4.94065645841246544E-324 for negative values; 4.94065645841246544E-324 through 1.79769313486231570E+308 for positive values. |
Integer
|
System.Int32
|
4 bytes
|
-2,147,483,648 through 2,147,483,647.
|
Long
(long integer) |
System.Int64
|
8 bytes
|
-9,223,372,036,854,775,808 through 9,223,372,036,854,775,807.
|
Object
|
System.Object (class)
|
4 bytes
|
Any type can be stored in a variable of type Object.
|
Short
|
System.Int16
|
2 bytes
|
-32,768 through 32,767.
|
Single
(single-precision floating-point) |
System.Single
|
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) |
System.String (class)
|
Depends on implementing platform
|
0 to approximately 2 billion Unicode characters.
|
User-Defined Type
(structure) |
(inherits from System.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.
|
Walaupun dewasa ini, memori dan media penyimpanan data tidak menjadi
masalah seperti pada awal kelahiran komputer, tetapi hendaklah programmer
bijaksana dalam pemakaian type data berkaitan dengan perfomance yang
dihasilkan.
