True or False

$47.T,F,$ The operand of the increment and decrement operators can be any valid mathematical expression.

$48.T$ F The cout statement in the following program segment will display $5$ ;

int $x=5$

cout $x++$;

$TF$ The cout statement in the following program segment will display $5$ :

int $x=5$

cout $++x$

T F The while loop is a pretest loop.

T F The do$-$while loop is a pretest loop.

T F The for loop is a posttest loop.

T F It is not necessary to initialize counter variables.