Re: how do I do this index in p6?

[Parrot Raiser]

Built-in constants:
pi, tau, e, i

perl6 -e  'say pi ~ "  " ~ tau ~ "   " ~ e ~ "  " ~ i';

3.141592653589793  6.283185307179586  2.718281828459045  0+1i
(tau is 2pi, useful if you want to calculate the circumference of your tuits.
Pi and tau can also be accessed as the Unicode characters.

User-defined
constant answer = 42;

Scope is lexical:
constant where = "outer";
say where; {
    constant where = "inner";
    say where;
}
say where;