# while loop
i = 1;
while i < 7
  print(i^2, "; ")
  global i = i + 2
end
# for loop using iterators
for n in 1:5
  print(2^n, "--")
end
# implied nested loop
for i = 1:2, j = 1:2
  println([i, j])
end
# loop over container
for i in ["first", "second", "third"]
  println(i)
end