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Edit documentation.

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This commit is contained in:
Stephen Chung
2020-06-22 00:03:45 +08:00
parent 7cc1a3f5dc
commit d728ac6758
37 changed files with 386 additions and 147 deletions
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17
doc/src/language/variables.md
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@@ -3,6 +3,9 @@ Variables
{{#include ../links.md}}
Valid Names
-----------
Variables in Rhai follow normal C naming rules (i.e. must contain only ASCII letters, digits and underscores '`_`').
Variable names must start with an ASCII letter or an underscore '`_`', must contain at least one ASCII letter,
@@ -11,9 +14,21 @@ and must start with an ASCII letter before a digit.
Therefore, names like '`_`', '`_42`', '`3a`' etc. are not legal variable names, but '`_c3po`' and '`r2d2`' are.
Variable names are also case _sensitive_.
Variables are defined using the `let` keyword. A variable defined within a statement block is _local_ to that block.
Variable names cannot be the same as a [keyword].
Declare a Variable
------------------
Variables are declared using the `let` keyword.
Variables do not have to be given an initial value.
If none is provided, then it defaults to [`()`].
A variable defined within a statement block is _local_ to that block.
```rust
let x; // ok - value is '()'
let x = 3; // ok
let _x = 42; // ok
let x_ = 42; // also ok