Conditional functions

Learn how to use and combine conditional functions in APL.

Use conditional functions to branch query logic based on evaluated predicates. They let you map values to labels, define alert tiers, or apply different transformations to different rows in a single expression.

List of functions

Function	Description
case	Evaluates a list of conditions and returns the value paired with the first condition that’s true.
iff	Evaluates a single predicate and returns one of two values. iif is an alias.