# Why is this printing to REPL?
**URL:** https://discourse.julialang.org/t/why-is-this-printing-to-repl/15981
**Category:** New to Julia
**Created:** [October 6, 2018, 10:25pm UTC](https://discourse.julialang.org/t/why-is-this-printing-to-repl/15981 "2018-10-06T22:25:36Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@GregVernon](https://discourse.julialang.org/u/GregVernon)
#### Post date: [October 6, 2018, 10:25pm UTC](https://discourse.julialang.org/t/why-is-this-printing-to-repl/15981/1 "2018-10-06T22:25:36Z")
Sorry, new to Julia (from Matlab),
If I copy + paste this into the REPL (Julia v1.0.0), no output is printed:
```julia
N = 1024;
A = rand(Float64,N,N);
B = rand(Float64,N,N);
ii = 2:N-1;
jj = 2:N-1;
J = zeros(Float64,N,N);
@time @views J[jj,ii] .= A[jj.+1,ii.-1] .- B[jj.-1,ii.+1];
```
But if I save to a file run via include:
```julia
include("C:/my/path/to/why.jl")
```
It prints the following:
```julia
1022×1022 view(::Array{Float64,2}, 2:1023, 2:1023) with eltype Float64:
```
followed by the contents of the array.
If I put a semicolon after the include statement, e.g. `include();`, nothing is printed, but it’s not clear to me whether this is expected behavior – I have semicolons everywhere in the included file, so why is anything being printed? Is this negatively affecting performance, even with the `include();` version?
---
### Author:  [@yuyichao](https://discourse.julialang.org/u/yuyichao)
#### Post date: [October 6, 2018, 10:39pm UTC](https://discourse.julialang.org/t/why-is-this-printing-to-repl/15981/2 "2018-10-06T22:39:13Z")
> [@GregVernon](#):
>
> N = 1024;
The only place where values get printed automatically when not followed by a `;` is the REPL (or things that are similar to the REPL like IJulia notebook). This is totally different from the matlab behavior that IMO doesn’t make any sense from a programing language POV and extremely annoy in practice.
This means that the `;` in your script is having no effect what so ever on the REPL printing, only what you type in the REPL does. You didn’t have the `;` on the `include` so whatever `include` returns will be printed.
> [@GregVernon](#):
>
> whether this is expected behavior
Yes.
> [@GregVernon](#):
>
> I have semicolons everywhere in the included file
Which have no effect at all.
> [@GregVernon](#):
>
> so why is anything being printed?
Because it’s the return value of the `include` that’s printed, which is the value of the last expression in the file.
> [@GregVernon](#):
>
> Is this negatively affecting performance, even with the `include();` version?
No. This is purely a REPL statement behavior and has nothing to do with the behavior and therefore the performance anywhere else.
---
### Author:  [@GregVernon](https://discourse.julialang.org/u/GregVernon)
#### Post date: [October 6, 2018, 11:14pm UTC](https://discourse.julialang.org/t/why-is-this-printing-to-repl/15981/3 "2018-10-06T23:14:49Z")
Thank you.