# Let x = 1 # ParseError
**URL:** https://discourse.julialang.org/t/let-x-1-parseerror/130050
**Category:** General Usage
**Tags:** question, bug, repl
**Created:** [June 20, 2025, 5:35am UTC](https://discourse.julialang.org/t/let-x-1-parseerror/130050 "2025-06-20T05:35:38Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)
#### Post date: [June 20, 2025, 5:35am UTC](https://discourse.julialang.org/t/let-x-1-parseerror/130050/1 "2025-06-20T05:35:39Z")
I don’t know what’s going wrong here.
```julia
PS K:\uc24> julia
_
_ _ _(_)_ | Documentation: https://docs.julialang.org
(_) | (_) (_) |
_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 1.11.5 (2025-04-14)
_/ |\ __'_|_|_|\__'_| | Official https://julialang.org/ release
|__/ |
```
```julia
julia> let x = 1
x
end
1
julia> let x = 1 #
ERROR: ParseError:
# Error @ REPL[2]:1:10
let x = 1 #
# └ ── premature end of input
Stacktrace:
[1] top-level scope
@ none:1
```
---
### Author:  [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)
#### Post date: [June 20, 2025, 5:40am UTC](https://discourse.julialang.org/t/let-x-1-parseerror/130050/2 "2025-06-20T05:40:54Z")
It looks like that functions don’t suffer this
```julia
julia> function mysum(a, #
b)
return a + b
end
mysum (generic function with 1 method)
julia> mysum(3, 4)
7
```
---
### Author:  [@Sevi](https://discourse.julialang.org/u/Sevi)
#### Post date: [June 20, 2025, 5:46am UTC](https://discourse.julialang.org/t/let-x-1-parseerror/130050/3 "2025-06-20T05:46:50Z")
Might be an issue with the REPL and how unfinished expressions are recognized? Or perhaps there is some ambiguity in the unfinished `let` block?
The function example should work because the open parenthesis `(` is always enough to tell that the expression is not complete yet.
But this also works
```julia-repl
julia> begin x = 1 #
end
1
```
---
### Author:  [@Benny](https://discourse.julialang.org/u/Benny)
#### Post date: [June 20, 2025, 6:13am UTC](https://discourse.julialang.org/t/let-x-1-parseerror/130050/4 "2025-06-20T06:13:39Z")
Definitely a REPL limitation, like how we get a `ParseError` in strings or code if we input too many newlines even though that’d be fine if `include`-d from a file. Couple weird workarounds:
```julia
julia> let x = 1 # wrote this comment after the next line
x
end
1
julia> let x = 1; # wrote this comment immediately
x
end
1
```
---
### Author:  [@WalterMadelim](https://discourse.julialang.org/u/WalterMadelim)
#### Post date: [June 20, 2025, 6:23am UTC](https://discourse.julialang.org/t/let-x-1-parseerror/130050/5 "2025-06-20T06:23:55Z")
So it’s a bug. Will it be fixed?
* * *
Update: I’ve opened an issue [Let x = 1 # ParseError · Issue #58782 · JuliaLang/julia · GitHub](https://github.com/JuliaLang/julia/issues/58782)
---
### Author:  [@Benny](https://discourse.julialang.org/u/Benny)
#### Post date: [June 20, 2025, 6:36am UTC](https://discourse.julialang.org/t/let-x-1-parseerror/130050/6 "2025-06-20T06:36:46Z")
Like most users, I have no idea. You might see where the developers are at if you open a Github issue about this. If it’ll help, this particular REPL limitation seems to have started in v1.10 when JuliaSyntax.jl replaced the femtolisp-based parser; you can confirm by comparing v1.9 and v1.10.
---
### Author:  [@mbauman](https://discourse.julialang.org/u/mbauman)
#### Post date: [July 1, 2025, 1:25am UTC](https://discourse.julialang.org/t/let-x-1-parseerror/130050/7 "2025-07-01T01:25:47Z")
3 posts were split to a new topic: [Syntax of multiple let assignments vs tuples](https://discourse.julialang.org/t/syntax-of-multiple-let-assignments-vs-tuples/130357)