# Extended control flow?
**URL:** https://discourse.julialang.org/t/extended-control-flow/26529
**Category:** New to Julia
**Created:** [July 19, 2019, 4:15am UTC](https://discourse.julialang.org/t/extended-control-flow/26529 "2019-07-19T04:15:50Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Masacroso](https://discourse.julialang.org/u/Masacroso)
#### Post date: [July 19, 2019, 4:15am UTC](https://discourse.julialang.org/t/extended-control-flow/26529/1 "2019-07-19T04:15:50Z")
I wrote some code with this structure
```julia
function(x)
x >=0 && plot!(something)
x <=0 && plot!(something different)
end
```
because I tried to select with the value of `x` what would be plotted: one of them of both plots at once. The code worked as expected for values of `x` lesser or equal to zero, but for positive values the return of the function was not a plot if not just the statement `false`.
How to make that my program work fine also for positive values of `x`?
* * *
I have also a second question: there is some macro or package that extends the control flow of Julia for something like [cases](https://en.wikipedia.org/wiki/Control_flow#Case_and_switch_statements)? That is: a list of independent blocks of code that depend on a unique variable, something similar to what I tried in my toy program above, but that indeed execute each block independently.
---
### Author:  [@c42f](https://discourse.julialang.org/u/c42f)
#### Post date: [July 19, 2019, 4:27am UTC](https://discourse.julialang.org/t/extended-control-flow/26529/2 "2019-07-19T04:27:00Z")
Every statement in Julia is also an expression, including an `if` block, so (asuming you don’t want both expressions to execute when `x==0`) you could write
```julia
function(x)
if x >= 0
plot!(something)
else
plot!(something different)
end
end
```
The return value will be the value produced by `plot!` on whichever branch was executed. Alternatively you could explicitly `return` if you like that more imperative style better:
```julia
function(x)
if x >=0
return plot!(something)
else
return plot!(something different)
end
end
```
There is no case statement built into the language, but if you regularly do this kind of thing you could try `Match.jl` or a similar package: [Home · Match.jl](http://kmsquire.github.io/Match.jl/latest/#Match-Values-1)
---
### Author:  [@Masacroso](https://discourse.julialang.org/u/Masacroso)
#### Post date: [July 19, 2019, 4:40am UTC](https://discourse.julialang.org/t/extended-control-flow/26529/3 "2019-07-19T04:40:51Z")
Im asking exactly for the case that the executions are non exclusive, that is, I want that both plots execute when `x==0`. In short: I want some control flow for non exclusive blocks of code, that is, that the blocks of code would execute independently depending of one variable (the variable that chooses what blocks are executed and what aren’t).
Anyway thank you for the answer, I will take a look at the package Match.jl.
---
### Author:  [@c42f](https://discourse.julialang.org/u/c42f)
#### Post date: [July 19, 2019, 5:08am UTC](https://discourse.julialang.org/t/extended-control-flow/26529/4 "2019-07-19T05:08:11Z")
Well I guess you could do the following to solve your return value problem
```julia
function(x)
x >= 0 && (p = plot!(something))
x <= 0 && (p = plot!(something different))
return p
end
```
or equivalent thing using `if` statements, but there’s no special syntax for that.
---
### Author:  [@Masacroso](https://discourse.julialang.org/u/Masacroso)
#### Post date: [July 19, 2019, 5:14am UTC](https://discourse.julialang.org/t/extended-control-flow/26529/5 "2019-07-19T05:14:51Z")
It worked like a charm, thank you.