switch Statement

The switch statement selects a block of code to execute based on the value of an expression.

switch expression do
    case value1 then
        # body
    case value2, value3 then
        # body
    default then
        # body
end

Syntax rules

• The do keyword follows the switch expression
• Each case block uses then to open and is implicitly terminated by the next case, default, or the closing end
• Multiple values per case are comma-separated
• The default clause is optional and handles unmatched values
• The outer switch block is closed with end

No fall-through

Only the matched case executes. There is no fall-through between cases, and no break is needed.

switch Data.action do
    case "create" then
        Data.status = "created"
    case "update", "patch" then
        Data.status = "updated"
    default then
        Data.status = "unknown"
end

In this example, if Data.action is "update" or "patch", only the second case body executes. The default case is skipped.

No match without default

If no case matches and there is no default clause, execution silently continues past the switch statement:

switch Data.status do
    case "active" then
        Data.label = "Active"
    case "inactive" then
        Data.label = "Inactive"
end
# If Data.status is "pending", execution continues here with no case executed