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Match expressions

Use match expressions to create expressions that are executed if a match assignment is true

match expr with
    [] then "Empty"
    [1 | rest] then "Has elements"

combining matches with AND and OR​

use && or || to match the value with many expressions

match expr with
    [] && [1] then "Do something"
    [1 | rest] then "Do another thing"

Exhausting a match with _​

k# will validate the match expression always returns a value. You can use _ to assert any value when create a match with infinite possible number of values.

match expr with
    1 then "One"
    2 then "Two"
    _ then "Other value"

Calling functions in match clauses​

If you want to use the expr into a match clause, you can combine many clauses with &&

match expr with
    x && even x then "Even"
    _ then "Odd"
note

To know more about the expressions used in match check match assignment expressions