$name = $host.Name 
"Your host is called $name."

PS> "Your host is called $host.Name."
Your host is called System.Management.Automation.Internal.Host.InternalHost.Name.

# get available space in bytes for C: drive 
$freeSpace = ([WMI]'Win32_LogicalDisk.DeviceID="C:"').FreeSpace 
 
# convert to MB 
$freeSpaceMB = $freeSpace / 1MB 
 
# output 
"Your C: drive has $freeSpaceMB MB space available."

# insert any data into the text template 
'Your host is called {0}.' -f $host.Name 
 
# calculate free space on C: in MB 
$freeSpace = ([WMI]'Win32_LogicalDisk.DeviceID="C:"').FreeSpace 
$freeSpaceMB = $freeSpace /1MB 

# output with just ONE digit after the comma 
'Your C: drive has {0:n1} MB space available.' -f $freeSpaceMB