SHELL

powershell if file exists

# Check if file doesn't exists
if (-not(Test-Path -Path "$directory/$file" -PathType Leaf)) {
	# File doesn't exist
}

# Check if file does exists
if (Test-Path -Path "$directory/$file" -PathType Leaf) {
	# File does exist
}

powershell check if file exists

Test-Path <path to file> -PathType Leaf