can always be replaced by a nested it-then-else clause

enhances logical clarity

can't always be replaced by a nested if -then-else clause

Both can always be replaced by a nested it-then-else clause and enhances logical clarity

goto

return

exit

any of the above features

prints nothing

results in a syntax error

prints four 0

none of the above

a>b

a<b

a==b

none of above

0 times

1 times

infinitely many times

will not be executed because of syntax error