The ternary ?: is a short if-then-else:
A ? B : C
# is equivalent to
if ( A ) { B } else { C }
The advantage is that it's an expression, in contrast to if-else, which is a control structure. So.
print A ? B : C; #correct
# equivalent if-else?
print if(A){ B }else{ C }; #nope
# does the same, but doesn't mean the same:
if( A ){ print B }
else { print C }
HTH. See perlop for further enlightment.
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