# For loop in Julia

**URL:** <https://discourse.julialang.org/t/for-loop-in-julia/77468>\
**Category:** New to Julia\
**Created:** [March 6, 2022, 9:48am UTC](https://discourse.julialang.org/t/for-loop-in-julia/77468 "2022-03-06T09:48:51Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Eric.O](https://avatars.discourse-cdn.com/v4/letter/e/9dc877/32.png) [@Eric.O](https://discourse.julialang.org/u/Eric.O)\
**Post date:** [March 6, 2022, 9:48am UTC](https://discourse.julialang.org/t/for-loop-in-julia/77468/1 "2022-03-06T09:48:51Z")

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Kindly help me out.

# Rewrite using a for loop

@constraint(model, X^2 + y^2 - d[1]-2X-2y \<= -2)

@constraint(model, X^2 + y^2 - d[2]-2X-8y \<= -17)

@constraint(model, X^2 + y^2 - d[3]-8X-8y \<= -32)

---

<div class="post-metadata">

**Author:** ![lawless-m](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lawless-m/32/30869_2.png) [@lawless-m](https://discourse.julialang.org/u/lawless-m)\
**Post date:** [March 6, 2022, 10:37am UTC](https://discourse.julialang.org/t/for-loop-in-julia/77468/2 "2022-03-06T10:37:13Z")

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does this not work ?

```julia
xs = [2, 2, 8]
ys = [2, 8, 8]
ms = [-2, -17, -32]
for k in 1:3
   @constraint(model, X^2 + y^2 - d[k]-xs[k]*X-ys[k]*y <= ms[k])
end
```

---

<div class="post-metadata">

**Author:** ![Eric.O](https://avatars.discourse-cdn.com/v4/letter/e/9dc877/32.png) [@Eric.O](https://discourse.julialang.org/u/Eric.O)\
**Post date:** [March 6, 2022, 5:27pm UTC](https://discourse.julialang.org/t/for-loop-in-julia/77468/3 "2022-03-06T17:27:47Z")

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> [@lawless-m](#):
>
> ```julia
> for k in 1:3
> @constraint(model, X^2 + y^2 - d[k]-xs[k]*X-ys[k]*y <= ms[k])
> end
> 
> ```

Thank you very much.  
The problem has been solved.