$ perl -Mstrict -Mwarnings -le 'print (1==0) ? "true" : "false"'
print (...) interpreted as function at -e line 1.
Useless use of a constant ("true") in void context at -e line 1.
Useless use of a constant ("false") in void context at -e line 1.

$ perl -Mstrict -Mwarnings -le 'print +(1==0) ? "true" : "false"'
false