The following table lists the pre-declared types in the Modula-2 language.
The identifiers for these types are automatically defined in every Modula-2
module.
| Type |
Storage size |
Range |
| INTEGER |
16-bit compiler: 2 bytes
32-bit compiler: 4 bytes |
-32768 to 32767
-2,147,483,648 to 2,147,483,647 |
| CARDINAL |
16-bit compiler: 2 bytes
32-bit compiler: 4 bytes |
0 to 65535
0 to 4,294,967,295 |
| REAL |
4 bytes |
Real numbers with an approximate range of 8.43E-37 to 3.37E+38 and an
accuracy of about 7 decimal digits |
| LONGREAL |
8 bytes |
Real numbers with an approximate range of 4.19E-307 to 1.67E+308 and an
accuracy of about 16 decimal digits |
| COMPLEX |
8 bytes |
Complex numbers where the real and imaginary Components are of type
REAL |
| LONGCOMPLEX |
16 bytes |
Complex numbers where the real and imaginary Components are of type
LONGREAL |
| BOOLEAN |
1 byte |
An enumeration type with the values FALSE and TRUE |
| CHAR |
ANSI (8-bit): 1 byte
Unicode (16-bit): 2 bytes |
A character in the ANSI (8-bit) or Unicode (16-bit) character set. |
| BITSET |
2 bytes |
A PACKEDSET type with an ordinal range of CARDINAL[0..15] |
