continue block - execute just before the condition is reevaluated
The continue block allows you to define a block that will be executed just before the condition is reevaluated. If you write a continue block after while statement as shown below, you can write the process before moving to the next condition.
while (condition) { ... } continue { ... }
You can write any looping without using this syntax, so it's wise not to use it.
See continue syntax official documentation for a detailed explanation.
Is there a syntax in Perl that corresponds to C language or Java continue?
C and Java continue statement can go to the beginning of the next loop, but Perl uses next statement to do this syntax. For next statement, refer to the explanation below.