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Conditionals

Numbat has if-then-else conditional expressions with the following syntax 

if <cond> then <expr1> else <expr2>
where <cond> is a condition that evaluates to a Boolean value, like 3 ft < 3 m. The types of <expr1> and <expr2> need to match.

For example, you can define a simple step function using

fn step(x) = if x < 0 then 0 else 1