multiple nested for loops combined in a single outer loop, forming the cartesian product of the iterables

nesting_loops.jl

for i = 1:5, j = 1:2
  println((i, j))
end

# yields:
# (1, 1)
# (1, 2)
# (2, 1)
# (2, 2)
# (3, 1)
# (3, 2)
# (4, 1)
# (4, 2)
# (5, 1)
#(5, 2)

for i = 1:3, j = 1:5, k = -2:0
  println((i, j, k))
end

# yields:
# (1, 1, -2)
# (1, 1, -1)
# (1, 1, 0)
# (1, 2, -2)
# (1, 2, -1)
# (1, 2, 0)
# (1, 3, -2)
# (1, 3, -1)
# (1, 3, 0)
# (1, 4, -2)
# (1, 4, -1)
# (1, 4, 0)
# (1, 5, -2)
# (1, 5, -1)
# (1, 5, 0)
# (2, 1, -2)
# (2, 1, -1)
# (2, 1, 0)
# (2, 2, -2)
# (2, 2, -1)
# (2, 2, 0)
# (2, 3, -2)
# (2, 3, -1)
# (2, 3, 0)
# (2, 4, -2)
# (2, 4, -1)
# (2, 4, 0)
# (2, 5, -2)
# (2, 5, -1)
# (2, 5, 0)
# (3, 1, -2)
# (3, 1, -1)
# (3, 1, 0)
# (3, 2, -2)
# (3, 2, -1)
# (3, 2, 0)
# (3, 3, -2)
# (3, 3, -1)
# (3, 3, 0)
# (3, 4, -2)
# (3, 4, -1)
# (3, 4, 0)
# (3, 5, -2)
# (3, 5, -1)
# (3, 5, 0)