# Loops, allocations and helping the coder

**URL:** <https://discourse.julialang.org/t/loops-allocations-and-helping-the-coder/104733>\
**Category:** Internals & Design\
**Created:** [October 8, 2023, 6:18pm UTC](https://discourse.julialang.org/t/loops-allocations-and-helping-the-coder/104733 "2023-10-08T18:18:05Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![nsajko](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/nsajko/32/221187_2.png) [@nsajko](https://discourse.julialang.org/u/nsajko)\
**Post date:** [October 8, 2023, 7:22pm UTC](https://discourse.julialang.org/t/loops-allocations-and-helping-the-coder/104733/4 "2023-10-08T19:22:04Z")

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> [@Paul\_Soderlind](#):
>
> For instance, by letting `local X` inside a loop mean that that `X` is created in the first iteration and subsequently any `X = ` will lead to mutating the existing `X`?

This particular proposal would break backwards compatibility, which is a no-go:

> [@PSA: Julia is not at that stage of development anymore](https://discourse.julialang.org/t/psa-julia-is-not-at-that-stage-of-development-anymore/44872):
>
> You heard about this brand new exciting programming language called Julia and have some suggestions for how it should work. Wonderful! We’re happy to have you here and help you learn the language and listen to your ideas! However, please be aware that “new” is a relative term. Yes, Julia is newer than, say, C, which was first created in 1972 and standardized in 1989. It is not, however, new in the sense that it is still being freely designed and changed in arbitrary ways. Julia development start…

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