Task

 Describe, and give a pointer to documentation on your languages use of characters beyond those of the ASCII character set in the naming of variables.
 Show how to:
 Set a variable with a name including the 'Δ', (delta character), to 1 
 Increment it
 Print its value.


Related task
 
 Case-sensitivity of identifiers


define ∆increment(∆ref) {
  @∆ref++;
}
variable foo∆bar = 1;
foo∆bar++;
variable ∆bar = 1;
∆bar++;
∆increment(&∆bar);
% foo∆bar should be 2 and ∆bar should be 3.
print(foo∆bar);
print(∆bar);
 