DIGITAL Command Language - Indirect Variable Referencing

Indirect Variable Referencing

It is possible to build arrays in DCL that are referenced through translated symbols. This allows the programmer to build arbitrarily sized data structures using the data itself as an indexing function.

$ i = 1 $ variable'i' = "blue" $ i = 2 $ variable'i' = "green" $ j = 1 $ color = variable'j' $ rainbow'color' = "red" $ color = variable'i' $ rainbow'color' = "yellow"

In this example the variable rainbowblue is assigned the value "red", and rainbowgreen is assigned the value "yellow".

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