You can use Test-Path to test if file is exist.

But you can also use [System.IO.File]::Exists() to check it fast.

1

[System.IO.File]::Exists("Your File Path")

You can use in if block to check it on one line:

1
2
3
4

if ([System.IO.File]::Exists("C:\setup.log"))
{
Write-Output "File Exist"
}

It will also use less memory.