Safely converting string to bool in PowerShell

Question

I\'m trying to convert an argument of my PowerShell script to a boolean value. This line

[System.Convert]::ToBoolean($a)

works fine as long

Answer 1

Prior answers are more complete, but if you know that $foo -eq 1, "1", 0, "0", $true, $false... anything that can be coerced to an [int]

Either of the following statements work:

[System.Convert]::ToBoolean([int]$foo)
[System.Convert]::ToBoolean(0 + $foo)

Hope that helps someone that just needs a simple solution.