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Const declares constants, which can be used in expressions, in place of literal values. The required component, ''name'', must follow standard variable naming conventions. The required component, ''expression'', is any literal, constant, or combination that includes all arithmetic or logical operators (except IS). | Const declares constants, which can be used in expressions, in place of literal values. The required component, ''name'', must follow standard variable naming conventions. The required component, ''expression'', is any literal, constant, or combination that includes all arithmetic or logical operators (except IS). | ||
All constants declared inside procedures are available only within the procedure. Const works the same way as | All constants declared inside procedures are available only within the procedure. Const works the same way as [[dim|Dim]], however it is used to identify variables whose value should not be changed. | ||
Multiple constants may be declared on a single line, by separating each constant assignment with a comma. | Multiple constants may be declared on a single line, by separating each constant assignment with a comma. | ||
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<pre> | <pre> | ||
Rem Const Example | |||
'Const defines constants | 'Const defines constants | ||
Const SHAPE = "Rectangle" | Const SHAPE = "Rectangle" | ||
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Const LENGTH = 7, WIDTH = 11 | Const LENGTH = 7, WIDTH = 11 | ||
PrintArea LENGTH, WIDTH | PrintArea LENGTH, WIDTH | ||
Sub PrintArea(l, w) | |||
Dim Area | |||
Area = l * w | Area = l * w | ||
Print SHAPE & " area: " & l & " * " & w &" = " & Area | |||
END SUB | END SUB | ||
</pre> | </pre> | ||
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== Related Items == | == Related Items == | ||
[[function| | [[function|Function]], [[sub|Sub]] | ||
[[Category:Language Reference]] | [[Category:Language Reference]] | ||
Revision as of 00:26, 24 August 2012
Const name=expression
Description
Const declares constants, which can be used in expressions, in place of literal values. The required component, name, must follow standard variable naming conventions. The required component, expression, is any literal, constant, or combination that includes all arithmetic or logical operators (except IS).
All constants declared inside procedures are available only within the procedure. Const works the same way as Dim, however it is used to identify variables whose value should not be changed.
Multiple constants may be declared on a single line, by separating each constant assignment with a comma.
Example
Rem Const Example 'Const defines constants Const SHAPE = "Rectangle" Const AREA = 51 Const LENGTH = 7, WIDTH = 11 PrintArea LENGTH, WIDTH Sub PrintArea(l, w) Dim Area Area = l * w Print SHAPE & " area: " & l & " * " & w &" = " & Area END SUB
Output
Rectangle area:7*11=77