C# 5.0 Programmer's Reference

Data Types ❘ 55
C# also groups bytes in different ways to form data types with a greater logical meaning. For
example, it uses 4 bytes to make an integer, a numeric data type that can hold values between
−2,147,483,648 to 2,147,483,647.
The following table summarizes C#’s elementary data types.
Name Type Size Values
Boolean bool 2 bytes True or False.
Byte byte 1 byte 0 to 255.
Signed byte sbyte 1 byte −128 to 127.
Character char 2 bytes 0 to 65,535.
Short integer short 2 bytes −32,768 to 32,767.
Unsigned short
integer
ushort 2 bytes 0 through 65,535.
Integer int 4 bytes −2,147,483,648 to 2,147,483,647.
Unsigned integer uint 4 bytes 0 through 4,294,967,295.
Long integer long 8 bytes −9,223,372,036,854,775,808 to
9,223,372,036,854,775,807.
Unsigned long
integer
ulong 8 bytes 0 through 18,446,744,073,709,551,615.
Decimal decimal 16 bytes 0 to +/−79,228,162,514,264,337,593,543,9
50,335 with no decimal point; 0 to +/−7.9
228162514264337593543950335 with 28
places to the right of the decimal place.
Single-precision
floating point
number
Double-precision
floating point
number
float 4 bytes −3.4028235E+38 to −1.401298E-45
(negative values); 1.401298E-45 to
3.4028235E+38 (positive values).
double 8 bytes −1.79769313486231570E+308 to
−4.94065645841246544E-324 (negative
values); 4.94065645841246544E-324 to
1.79769313486231570E+308 (positive
values).
String string varies Depending on the platform, a string can
hold approximately 0 to 2 billion Unicode
characters.
continues
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