#!/usr/bin/perl
use strict;
use warnings;

# this is the range operator used in list context ... it returns numbers 1 to 27
for my $i (1 .. 27)
{

  # .. range operator used in scalar context returns a boolean value
  # It is false as long as the left operand is false
  # Once the left operand is true, the range operator remains true until the right operand is true
  # The operator doesn't become false until the next time it is evaluated
  # there is also a ... operator which behaves slightly different, i will spare us that one for now

  print "$i\n" if ( ($i%7==0) .. ($i%5==0) )

  # 1  false false = false
  # 2  false false = false
  # 3  false false = false
  # 4  false false = false
  # 5  false true  = false
  # 6  false false = false
  # 7  true  false = true
  # 8  false false = true
  # 9  false false = true
  # 10 false true  = true
  # 11 false false = false
  # 12 false false = false
  # 13 false false = false
  # 14 true  false = true
  # 15 false true  = true
  # 16 false false = false
  # 18 false false = false
  # 19 false false = false
  # 20 false true  = false
  # 21 true  false = true
  # 22 false false = true
  # 23 false false = true
  # 24 false false = true
  # 25 false true  = true
  # 26 false false = false
  # 27 false false = false
}