The meaning of a DO loop in Fortran is precisely specified in the Fortran standard...and is quite different from what many programmers might expect. In particular, Fortran iterative DO loops are implemented as if the number of trips through the loop is calculated before the loop is entered.

Do loop skip iterations?

If you have nested loops of the same type, for example a Do loop within another Do loop, a Continue Do statement skips to the next iteration of the innermost Do loop that contains it.

Are loops considered iterations?

Iteration is simply the number of time/times a loop can be executed, while loop is the code which generate or causes expressions to be iterated iteration when the loop is executing.