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Constants

Limbo does not have enum types, but does have the con keyword to indicate a constant value.

Source

const.b:13,14

n: con 7;
Red, Green, Blue: con iota;

The variable n is an integer constant with a value of 7.

The variables Red, Green, and Blue are integer constants with values 0, 1, and 2, respectively.

By default, the iota operator initializes variables on the left side with sequential values from 0 to n. Where n is the number of variables. The iota operator is only valid in expressions involving con.

Note: these variables are bound within the scope of this module's file.

const.b:19

s: con "Limbo";

The variable s is a string constant which is bound within the scope of the init() function.

Demo

; limbo const.b
; const
7
Red: 0 Green: 1 Blue: 2
Limbo
;

Exercises

  • Try to declare constants of other types, does con allow you to do this?
  • Change the iota statement such that the values of Red, Green, Blue are not increments of 1 and do not start at 0.