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;