The continue utility shall return to the top of the smallest
enclosing for, while, or until loop, or
to the top of the nth enclosing loop, if n is specified.
This involves repeating the condition list of a while
or until loop or performing the next assignment of a for
loop, and re-executing the loop if appropriate.
The value of n is a decimal integer greater than or equal to
1. The default shall be equivalent to n=1. If
n is greater than the number of enclosing loops, the outermost
enclosing loop shall be used.