Without that, the question mark is interpreted as a parameter on the cmdlet. You'll notice that I wrapped Test-Path in brackets before the question mark. (Test-Path $Path) ? 'File exists' : 'THE FILE IS MISSING!' This can instead be written using the ternary operator: $Path = 'C:\Support\ImportantFile.csv' Or to make things a little more familiar, consider this if/else statement: $Path = 'C:\Support\ImportantFile.csv' It's a little unfortunate overlap in syntax, but don't confuse this syntax with the question mark alias of Where-Object
To use the operator, follow this formula: ? : The ternary operator itself can be represented as ?: as those are the two characters used in the operator's syntax. I wouldn't be surprised if we see a lot of this operator the next time someone holds a one liner competition.
It is a rather succinct way of writing if/else type logic constructs. The ternary operator is present in many programming languages and, according to the PowerShell team's DevBlog on this release, is quite popular with C# developers. Since then preview 4 has been released, and that introduced yet another feature I want to have a closer look at: the ternary operator. It was only a fortnight ago that I was digging into the preview 3 release of PowerShell 7 looking at the new parallel for each loop feature.
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