View source for Constants and Expressions

==Constants==
Recital supports the following constants:


{| class="wikitable"
!Datatype||Description
|-
|Character||A string of ASCII characters up to 65535 characters in length. Delimited by double quotes "", single quotes &#145;&#146; or square brackets []
|-
|Numeric||An integer number of up to 16 digits (0-9) or a floating point number of up to 25 digits (9 are reserved for decimal places) and one decimal point.
|-
|Date||A combination of digits and separators delimited by curly braces {}.  The format is determined by the SET DATE and SET CENTURY commands.
|-
|Logical||A choice of two values,  .T. for true, .F. for false (true and false can also be used themselves)
|-
|}


====Hexadecimal numbers====
Hexadecimal numbers, prefixed by 0x, can be used in place of decimal numbers except in the data entry/modification of numerics. (Linux platforms only).


<code lang="recital">
? BITAND(0x67452301,0xFFFFFFFF)
</code>


Results of expressions will still be returned as decimal numbers.


<code lang="recital">
? 0x1a * 2
        52
</code>


The [[TRANSFORM()]] function can be used to return a numeric as a hexadecimal. 


<code lang="recital">
? transform((0x1a * 2),"@0")
0x00000034
</code>

==Expressions==

The [[TYPE()]] function can be used to determine the data type of any expression.


{| class="wikitable"
!uMemvar||TYPE("uMemvar")||Type
|-
|[hello]||’C’||Character
|-
|’goodbye’||’C’||Character
|-
|"RECITAL"||’C’||Character
|-
|1234||’N’||Numeric
|-
|1234.56||’N’||Numeric
|-
|"1234.56"||’C’||Character
|-
|0x2b||’N’||Numeric
|-
|{01/01/96}||’D’||Date
|-
|{01/01/1996}||’D’||Date
|-
|"01/01/96"||’C’||Character
|-
|.T.||’L’||Logical
|-
|.F.||’L’||Logical
|-
|opentags||’P’||Procedure
|-
|OMyObj||’O’||Object
|-
|Undetermined Type||’U’||Undefined
|-
|}


[[Category:Documentation]]
[[Category:Reference]]