# PerfectSquare

- `v::perfectSquare()`

Validates a perfect square.

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

***
See also:

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