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dido:public:s_cli:05_contents:01_prt:06_dddl:constant
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Table of Contents
2.2.1 CREATE CONSTANT Command
Purpose
A Constant is a symbolic name that captures a value does not change while a program is running and is usually used for capturing initialization or site specific parameters. Constants are in contrast with variables, which are symbols represent different values that can change during the execution of program.
A constant can be a:
- number such as
25,3.6,3.14, etc. - character such as the character
'a','$','_', etc. - text string such as
“Bitcoin”,“Hyperledger”,“Medical Records”, etc.
Syntax
CREATE CONSTANT <ConstantName> AS <SimpleExpression>;
Where
- ConstantName ::= textual name associated with the Constant
- SimpleExpression ::= NumericConstant | CharacterConstant | StringConstant
Examples
- | Examples of Defining Constants in DidoLL
CREATE CONSTANT PRECISION AS 2 CREATE CONSTANT Version AS 3.5.1 CREATE CONSTANT Currency_Symbol AS '§' CREATE CONSTANT Currency_Name AS "My Coin"
dido/public/s_cli/05_contents/01_prt/06_dddl/constant.1617672924.txt.gz · Last modified: 2021/04/05 21:35 by nick
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