# Iterate through all combinations of elements in an arbitrary number of arrays
**URL:** https://discourse.julialang.org/t/iterate-through-all-combinations-of-elements-in-an-arbitrary-number-of-arrays/68819
**Category:** General Usage
**Tags:** first-steps, array, iterators
**Created:** [September 27, 2021, 4:47pm UTC](https://discourse.julialang.org/t/iterate-through-all-combinations-of-elements-in-an-arbitrary-number-of-arrays/68819 "2021-09-27T16:47:12Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Torkel](https://discourse.julialang.org/u/Torkel)
#### Post date: [September 27, 2021, 4:47pm UTC](https://discourse.julialang.org/t/iterate-through-all-combinations-of-elements-in-an-arbitrary-number-of-arrays/68819/1 "2021-09-27T16:47:12Z")
I have an array `arrays` which contains a number of arrays (arbitrary). How do I iterate through all combinations of elelements? If I know that there are e.g. 3 arrays I can do:
```julia
for e1 in arrays[1], e2 in arrays[2], e3 in arrays[3]
do_stuff([e1,e2,e3])
end
```
but if the number is arbitrary, what do I do then?
---
### Author:  [@rdeits](https://discourse.julialang.org/u/rdeits)
#### Post date: [September 27, 2021, 4:50pm UTC](https://discourse.julialang.org/t/iterate-through-all-combinations-of-elements-in-an-arbitrary-number-of-arrays/68819/2 "2021-09-27T16:50:37Z")
You can use `Iterators.product`:
```julia
for elements in Iterators.product(arrays...)
do_stuff(elements)
end
```
---
### Author:  [@Torkel](https://discourse.julialang.org/u/Torkel)
#### Post date: [September 27, 2021, 4:53pm UTC](https://discourse.julialang.org/t/iterate-through-all-combinations-of-elements-in-an-arbitrary-number-of-arrays/68819/3 "2021-09-27T16:53:29Z")
That worked perfectly, loads of thanks 🙂