Executes one case from a list of mutually exclusive candidates.

Switch SwitchValue, CaseSense
Case CaseValue1:
Case CaseValue2a, CaseValue2b:


SwitchValue, CaseValue...

Values to compare, as described in the remarks below.


Type: Integer or String

Optionally specify one of the following values to force all values to be compared as strings:

"On" or 1 (True): Each comparison is case sensitive.

"Off" or 0 (False): The letters A-Z are considered identical to their lowercase counterparts.

"Locale": Each comparison is case insensitive according to the rules of the current user's locale. For details, see StrCompare.


If present, SwitchValue is evaluated once and compared to each case value until a match is found, and then that case is executed. Otherwise, the first case which evaluates to true (non-zero and non-empty) is executed. If there is no matching case and a Default is present, it is executed.

As with the = and == operators, when CaseSense is omitted, numeric comparison is performed if SwitchValue and the case value are both pure numbers, or if one is a pure number and the other is a numeric string. Each case value is considered separately and does not affect the type of comparison used for other case values.

If the CaseSense parameter is present, all values are compared as strings, not as numbers, and a TypeError is thrown if SwitchValue or a CaseValue evaluates to an object.

If the CaseSense parameter is omitted, string comparisons are case-sensitive by default.

Each case may list up to 20 values. Each value must be an expression, but can be a simple one such as a literal number, quoted string or variable. Case and Default must be terminated with a colon :.

The first statement of each case may be below Case or on the same line, following the colon. Each case implicitly ends at the next Case/Default or the closing brace. Unlike the switch statement found in some other languages, there is no implicit fall-through and Break is not used (except to break out of an enclosing loop).

As all cases are enclosed in the same block, a label defined in one case can be the target of Goto from another case. However, if a label is placed immediately above Case or Default, it targets the end of the previous case, not the beginning of the next one.

Default is not required to be listed last.

If, Else, Blocks


To test this example, type [ followed by one of the abbreviations listed below, any other 5 characters, or Enter/Esc/Tab/.; or wait for 4 seconds.

    Hook := InputHook("V T5 L4 C", "{enter}.{esc}{tab}", "btw,otoh,fl,ahk,ca")
    switch Hook.EndReason
    case "Max":
        MsgBox 'You entered "' Hook.Input '", which is the maximum length of text.'
    case "Timeout":
        MsgBox 'You entered "' Hook.Input '" at which time the input timed out.'
    case "EndKey":
        MsgBox 'You entered "' Hook.Input '" and terminated the input with ' Hook.EndReason '.'
    default:  ; Match
        switch Hook.Input
        case "btw":   Send "{backspace 3}by the way"
        case "otoh":  Send "{backspace 4}on the other hand"
        case "fl":    Send "{backspace 2}Florida"
        case "ca":    Send "{backspace 2}California"
        case "ahk":
            Send "{backspace 3}"
            Run "https://www.autohotkey.com"