shithub: limbobyexample

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add explanation for switch

--- a/README.md

+++ b/README.md

@@ -33,6 +33,7 @@

 - [Constants](./Constants)

 - [Loops](./Loops)

 - [If Else](./If-Else)

+- [Switch Case](./Switch)

 ## References

--- a/Switch/README.md

+++ b/Switch/README.md

@@ -2,31 +2,33 @@

 Limbo does not have a verbatim `switch` statement. Rather, it has a statement named `case` which is analogous, but not identical to C's switch-case construct. 

-Limbo case statements break by default and accept range matching operations involving the `or` and `to` keywords.

-

-Note: A break or continue followed by a label causes a break out of, or the next iteration of, the enclosing construct that is labeled with the same label. 

-

 ## Source

 ### switch.b:16,31

+This segment exemplifies a few features of limbo's case statement. There is an iterative loop wrapped around a case statement which has a boolean `or`'d section and a default section, indicated by the wildcard `*` operator. 

+Limbo case statements break by default and accept range matching operations involving the `or` and `to` keywords.

+A break or continue followed by a label causes a break out of, or the next iteration of, the enclosing construct that is labeled with the same label. 

+

 ### switch.b:33,42

+This case statement demonstrates the use of the `to` range operator in a given section while providing a specific section to match the `C` character as well. 

-

 ### switch.b:44,51

+Limbo is able to switch on string values, this can include a `nil` check, demonstrated by the `""` section. Note that there is no default section provided. The default section is not mandatory. 

-

 ### switch.b:53,60

+This case verifies whether a value is `0` or `1` to determine if a value is binary. 

-

 ### switch.b:62,69

+The valid types for case statements include: `int`, `string`, and `big`.

+Note that the `big` coercion statement is mandatory. 

 ## Demo

@@ -44,3 +46,4 @@

 ## Exercises

 - Try commenting out the `break` and/or `continue` keywords in the first switch, how does the behavior change?

+- Change the variable `c` to equal `'C'`, what's printed?