You can easily assign the [Int] type to a variable to make sure it can contain only digits. But did you know that you can also apply a regex validator (at least starting in PowerShell 4)?
This way, you can define that a variable should be integer but can only have numbers between 2 and 6 digits, or any other pattern you require:
PS> [ValidatePattern('^\d{2,6}$')][int]$id = 666 PS> $id = 10000 PS> $id = 1000000 Cannot check variable id. Value 1000000 is invalid for variable id. PS> $id = 10 PS> $id = 1 Cannot check variable id. Value 1 is invalid for variable id.
