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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.
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