# PerfectSquare

- `PerfectSquare()`

Validates whether the input is a perfect square.

```php
v::perfectSquare()->isValid(25); // true (5*5)
v::perfectSquare()->isValid(9); // true (3*3)
```

## Templates

### `PerfectSquare::TEMPLATE_STANDARD`

| Mode       | Template                                        |
| ---------- | ----------------------------------------------- |
| `default`  | {{subject}} must be a perfect square number     |
| `inverted` | {{subject}} must not be a perfect square number |

## Template placeholders

| Placeholder | Description                                                      |
| ----------- | ---------------------------------------------------------------- |
| `subject`   | The validated input or the custom validator name (if specified). |

## Categorization

- Math
- Numbers

## Changelog

| Version | Description |
| ------: | ----------- |
|   0.3.9 | Created     |

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See also:

- [Factor](Factor.md)
- [Fibonacci](Fibonacci.md)
- [PrimeNumber](PrimeNumber.md)