jbunke

// Ignore .js file extension - only used so GitHub's JavaScript linter provides decent code highlighting

/*
This script accepts an integer `to_check` and returns true if and only if it is a prime number.

Note the use of a when statement, DeltaScript's answer to switch statements.
Cases in when statements take three forms:
1. `is` cases compare the control expression against an expression and execute their body if the values are equal
2. `passes` cases provide a predicate that the control expression is tested against. 
    For a control variable of type T, predicates are functions of type (T -> bool).