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Add description of local kw in global scope #42794

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merged 5 commits into from
Jan 14, 2022
Merged

Add description of local kw in global scope #42794

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ec6f594
Add description of local kw at top-level
tomtuamnuq Oct 25, 2021
57e6e72
Merge branch 'JuliaLang:master' into docpatch-2
tomtuamnuq Jan 11, 2022
d0431fe
Fix doctest
tomtuamnuq Jan 11, 2022
d4c39d8
make explanation clear without scope
tomtuamnuq Jan 12, 2022
5b2a5d9
add global and fix whitespace
tomtuamnuq Jan 12, 2022
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16 changes: 16 additions & 0 deletions doc/src/manual/variables-and-scoping.md
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Expand Up @@ -99,6 +99,22 @@ julia> module E
ERROR: cannot assign variables in other modules
```

If a top-level expression contains a variable declaration with keyword `local`,
then that variable is not accessible outside that expression.
The variable inside the expression does not affect global variables of the same name.
An example is to declare `local x` in a `begin` or `if` block at the top-level:

```jldoctest
julia> x = 1
begin
local x = 0
@show x
end
@show x;
x = 0
x = 1
```

Note that the interactive prompt (aka REPL) is in the global scope of the module `Main`.

## Local Scope
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