# Callback at every 3 integrator steps in DIfferential equations.jl
**URL:** https://discourse.julialang.org/t/callback-at-every-3-integrator-steps-in-differential-equations-jl/56775
**Category:** New to Julia
**Created:** [March 9, 2021, 12:52am UTC](https://discourse.julialang.org/t/callback-at-every-3-integrator-steps-in-differential-equations-jl/56775 "2021-03-09T00:52:23Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Sarthak\_Choudhury](https://discourse.julialang.org/u/Sarthak_Choudhury)
#### Post date: [March 9, 2021, 12:52am UTC](https://discourse.julialang.org/t/callback-at-every-3-integrator-steps-in-differential-equations-jl/56775/1 "2021-03-09T00:52:23Z")
Hi there,
This is a pretty basic question. I wanted to create a callback function which works after every 3 integrator steps. Since the time-steps are adaptive and hence unknown, is there any integrator options I could use in the condition function. I am using Tsit5() as solver.
One way to do that would be to use Discrete Callbacks in prerequisite times but I dont want it to stop at extra timesteps.
I would be very grateful for any help.
---
### Author:  [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)
#### Post date: [March 9, 2021, 1:30am UTC](https://discourse.julialang.org/t/callback-at-every-3-integrator-steps-in-differential-equations-jl/56775/2 "2021-03-09T01:30:30Z")
> [@Sarthak\_Choudhury](#):
>
> One way to do that would be to use Discrete Callbacks in prerequisite times but I dont want it to stop at extra timesteps.
```julia
condition(u,t,integrator) = integrator.iter % 3 == 0
```
---
### Author:  [@Sarthak\_Choudhury](https://discourse.julialang.org/u/Sarthak_Choudhury)
#### Post date: [March 9, 2021, 1:50am UTC](https://discourse.julialang.org/t/callback-at-every-3-integrator-steps-in-differential-equations-jl/56775/3 "2021-03-09T01:50:38Z")
Thanks a lot
---
### Author:  [@josuagrw](https://discourse.julialang.org/u/josuagrw)
#### Post date: [October 8, 2022, 9:47am UTC](https://discourse.julialang.org/t/callback-at-every-3-integrator-steps-in-differential-equations-jl/56775/4 "2022-10-08T09:47:12Z")
Any chance this could become a documented field? 🤞
---
### Author:  [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)
#### Post date: [October 8, 2022, 9:54am UTC](https://discourse.julialang.org/t/callback-at-every-3-integrator-steps-in-differential-equations-jl/56775/5 "2022-10-08T09:54:18Z")
yes