if and elseif

The first conditional statement we will consider is the if statement. This is also one of the oldest statements used in high level languages.

Try this, vary one of the values.

$Variable1 = 32
$Variable2 = 32
if ( $Variable1 -ne $Variable2  )
{
    Write-Output "The condition was true"
}

We can also use elseif.

$day = 3

if ( $day -eq 0 ) { $result = 'Sunday'        }
elseif ( $day -eq 1 ) { $result = 'Monday'    }
elseif ( $day -eq 2 ) { $result = 'Tuesday'   }
elseif ( $day -eq 3 ) { $result = 'Wednesday' }
elseif ( $day -eq 4 ) { $result = 'Thursday'  }
elseif ( $day -eq 5 ) { $result = 'Friday'    }
elseif ( $day -eq 6 ) { $result = 'Saturday'  }

$result

Read this reference.

Create some examples using -like. My example finds a depth sounder in a standard NMEA0183 serial stream.

$FINDVALUE = '$SDDPT,2.98,,*66'
if ( $FINDVALUE -like '$SD*')
{
    Write-Output "Found a depth sounder"
}