How do I write a for loop in Perl?

Perl for Loop

  1. The init step is executed first, and only once. This step allows you to declare and initialize any loop control variables.
  2. Next, the condition is evaluated.
  3. After the body of the for loop executes, the flow of control jumps back up to the increment statement.
  4. The condition is now evaluated again.

How do I loop an array in Perl?

Best way to iterate through a Perl array

  1. foreach (@Array) { SubRoutine($_); }
  2. while($Element=shift(@Array)) { SubRoutine($Element); }
  3. while(scalar(@Array) !=0) { $Element=shift(@Array); SubRoutine($Element); }
  4. for my $i (0 .. $#Array) { SubRoutine($Array[$i]); }
  5. map { SubRoutine($_) } @Array ;

What are loops in Perl?

Loops in Perl are control structures that allow users to run a block of code multiple times.

Do loops syntax?

A do-while loop is a kind of loop, which is a kind of control statement. It is a loop with the test at the bottom, rather than the more usual test at the top. The syntax is: do { statements } while (condition);

What is the syntax for while loop?

Syntax of Do-While Loop in C: do { statements } while (expression); As we saw in a while loop, the body is executed if and only if the condition is true. In some cases, we have to execute a body of the loop at least once even if the condition is false.

How do I loop through a hash in Perl?

Answer: There are at least two ways to loop over all the elements in a Perl hash. You can use either (a) a Perl foreach loop, or (b) a Perl while loop with the each function. I find the Perl foreach syntax easier to remember, but the solution with the while loop and the each function is preferred for larger hashes.

What is the difference between for loop and for each loop in Perl?

In the Perl programming language has keywords for and foreach . They are used to create loops. Between them there is no difference.