---
title: Syntax Overview
description: Comments, literals, identifiers, and keywords in Mist.
icon: Code
---

### Comments

```mist
// Line comments only
```

### Literals

```mist
42              // Integer
3.14            // Float
true            // Boolean
false           // Boolean
"hello"         // String
(1, true, "x")  // Tuple
```

### Identifiers & Keywords

Keywords are reserved and cannot be used as identifiers:

`if`, `else`, `fn`, `for`, `while`, `match`, `return`, `break`, `continue`, `struct`, `enum`, `class`, `trait`, `impl`, `use`, `pub`, `mut`, `let`, `true`, `false`, `dyn`, `loop`, `unsafe`, `override`, `const`, `type`

Identifiers follow the pattern `[a-zA-Z_][a-zA-Z0-9_]*`.

### Visibility

```mist
// Private (default)
void internal() { }

// Public
pub void external() { }

// Public to specific path
pub(crate) void crate_only() { }
pub(super) void parent_only() { }
pub(my::module) void module_only() { }
```