The ****data types**** of an entity represent the behavior, i.e., operations, functions, and values associated with it. The data types are shown in the diagram below:

# Type declaration
The data types are declared as follows:
```C
type1, type1 = type-specifier;
```
The following example further illustrates it:
```C
type
month, year = string;
tax, bonus = integer;
```

# Integer types
Integers have various storage sizes and other properties. These are shown in the table below:
| Type  |  Minimum | Maximum | Format |
| - | - | -| - |
|Integer| -2147483648 |2147483647 |	32-bits signed|
Cardinal |0 |	4294967295  |32-bits unsigned|
Shortint 	|-128 	|127 	|8-bits signed|
Smallint 	|-32768 	|32767 	|16-bits signed|
Longint 	|- 2147483648 	|2147483647 	|32-bits signed|
Int64| 	-2 ^ 63 	|2 ^ 63 - 1 	|64-bits signed|
byte 	|0 	|255 	|8-bits unsigned|
Word 	|0 	|65535 	|16-bits unsigned |
Long word 	|0 	|4294967295 	|32-bits unsigned |

# Constants
Constants allow the declaration of types that have to be kept the same throughout the program. Using them makes the program more readable as the same does not have to be repeated multiple times. Constants are declared as follows:
```C
const_name = contant_value;
```
The example below further illustrates the use of constants:
```C
default_heading = "I hope you are having a good time on this platform"
counter = 100;
```


# Enumerated types
These are user-defined types that allow specific values to be given to a list, as shown below:
```C
type
enum-identifier = (member1, member2, member3, ... )
```
The example below further illustrates the use of enumerated types:
```C
type
days = (Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday);
```
The mentioned order defines the order of the listed members, e.g., Tuesday is preceded by Monday, and Wednesday is preceded by Wednesday.


# Sub-range types
These are user-defined types that allow declaring values that fall within a specific range, as shown below:
```C
type
subrange_name = lower_limit ... upper_limit;
```
The example below further illustrates the use of sub-range types:
```C
type
marks = 1 ... 100;
```



>Types should be declared before variables.

mlxtend.tar.gz

pascal

What are data types in Pascal?

Pascal data types define behavior, operations, and values. Types include integers, constants, enumerated, and sub-range types for specific ranges and readability.

Type	Minimum	Maximum	Format
Integer	-2147483648	2147483647	32-bits signed
Cardinal	0	4294967295	32-bits unsigned
Shortint	-128	127	8-bits signed
Smallint	-32768	32767	16-bits signed
Longint	- 2147483648	2147483647	32-bits signed
Int64	-2 ^ 63	2 ^ 63 - 1	64-bits signed
byte	0	255	8-bits unsigned
Word	0	65535	16-bits unsigned
Long word	0	4294967295	32-bits unsigned