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KRL provides support for conditional expressions with the following syntax:

<pred> => <consequent expr> | <alternate expr>

This is akin to the ?: ternary operator found in the C family of languages.
Conditional expressions can be nested to produce structures like the following:

<pred0> => <expr0> |
<pred1> => <expr1> |
<pred2> => <expr2> |
...
           <exprn>

Because of the limitations of the parser, most predicates will need to be enclosed in parentheses:

z = (x > y) => y | x