// This script defines a function with two parameters
let a = 3;
fn addme(a, b) {
a = 42; // notice that 'a' is passed by value
a + b; // notice that the last value is returned even if terminated by a semicolon
}
print(addme(a, 4)); // should print 46
print(a); // should print 3 - 'a' is never changed