The ? operator

The ? (ternary condition) operator is a more efficient form for expressing simple if statements. It has the following form:

expression1 ? expression2 : expression3

It simply states:

if expression1 then expression2 else expression3

For example to assign the maximum of a and b to z:

z = (a>b) ? a: b;

which is the same as:

if (a>b)

z=a;

else

z=b;