Which

Usage

• Which[, , , , ... ] evaluates each of the in turn, returning the value of the corresponding to the first one that yields True.

Notes

• Example: Which[12, x, 11, y].

• If any of the evaluated by Which give neither True nor False, then a Which object containing these remaining elements is returned unevaluated.

• You can make Which return a "default value" by taking the last to be True.

• If all the evaluate to False, Which returns Null.

Further Examples