% perl -wce 5
Useless use of a constant in void context at -e line 1.
-e syntax OK
% perl -wce 1
-e syntax OK
% perl -wce '5**0'
-e syntax OK
% perl -wce 1.00
-e syntax OK
% perl -wce 'q(1)'
Useless use of a constant in void context at -e line 1.
-e syntax OK