---
description: Constants should use SCREAMING_SNAKE_CASE
---

## Constants should use SCREAMING_SNAKE_CASE

**Severity**: `Info`
**ID**: `screaming-snake-case-const`

Flags `constant` state variables whose names do not follow `SCREAMING_SNAKE_CASE`.

### What it does

Reports state variables declared `constant` whose identifier is longer than one character and
deviates from `SCREAMING_SNAKE_CASE`. Leading and trailing underscores are preserved.

### Why is this bad?

The Solidity style guide recommends `SCREAMING_SNAKE_CASE` for constants so they stand out from
mutable state and immutables at call sites.

### Example

#### Bad

```solidity
uint256 constant maxSupply = 1_000_000;
uint256 constant Max_Supply = 1_000_000;
```

#### Good

```solidity
uint256 constant MAX_SUPPLY = 1_000_000;
```
