A

toop usually contains a boolean expression$($s$)$ in its header and

nothing else.

A

loop contains a header that specifies where an iterator variable

starts, where it ends, and how it is changed per iteration.

A ${?}^{TT}$

loop is better if a command needs to be executed a certain

number of times.

A counting variable needs to be declared and initialized before

a

loop can be executed properly.