---
title: Boolean Names: is/has/should Prefix
impact: MEDIUM
impactDescription: clarifies variable type and intent
tags: naming, booleans, quality, python
---

## Boolean Names: is/has/should Prefix

Boolean variables should be named as questions that yield a yes/no answer.

**Incorrect:**
```python
valid = True
active = False
login = True
```

**Correct:**
```python
is_valid = True
has_access = False
should_login = True
```