? sth : sth

Question

What does this mean?

return n % 2 == 1 ? '1' : '0';

Answer 1

this is a conditional operator. it is the same as writing :-
if(n % 2 == 1)
return '1';
else
return '0';

Answer 2

its called a ternary operator, not a conditional operator.
the first segment is a test, before the ?
second arg is the true statement. if the test is true, run that if its false run the third arg, after :