Getting the sign of the value

The sign method (also inherited from the Real role) returns either -1 or 1, depending on the sign of the value. Consider the following code snippet:

say 42.sign;  # 1
say -42.sign; # -1

The result of calling the method on zero is 0, as shown here:

say 0.sign; # 0

The sign method also works with infinities:

say Inf.sign;  # 1
say (-∞).sign; # -1