- 1 year ago
How to suppress output and check whether or not a command is successful?
To suppress the output of a command and check whether or not it is successful, you can use the redirection operators in PowerShell. Here's how you can do it:
Suppressing Output:
To suppress the output of a command, you can redirect the output stream to$null
. Here's an example:powershell# Suppress output using the redirection operator
$output = command 2>&1 > $null
Replace
command
with the actual command you want to run. The2>&1
redirects the error stream to the success stream, and> $null
redirects the success stream to$null
, effectively suppressing the output.Checking Success:
To check whether or not a command is successful, you can examine the$?
automatic variable. The value of$?
will be$true
if the previous command was successful, and$false
otherwise. Here's an example:powershell# Run the command and check success
command
if ($?) {
Write-Host "Command executed successfully"
} else {
Write-Host "Command failed"
}
Replace
command
with the actual command you want to run. Theif ($?)
statement checks the value of$?
to determine if the previous command was successful.
By combining these two techniques, you can suppress the output of a command and check its success at the same time.