Powershell command $table.Columns.Add("NewFieldName") results in unexpected output to console - powershell

Question

The following PowerShell script results in unexpected, and in my case unwanted, output to the console:
$table = New-Object System.Data.DataTable
$table.Columns.Add("NewFieldName")
Unexpected output:
AllowDBNull : True
AutoIncrement : False
AutoIncrementSeed : 0
AutoIncrementStep : 1
Caption : NewFieldName
ColumnName : NewFieldName
Prefix :
DataType : System.String
DateTimeMode : UnspecifiedLocal
DefaultValue :
Expression :
ExtendedProperties : {}
MaxLength : -1
Namespace :
Ordinal : 0
ReadOnly : False
Table : {}
Unique : False
ColumnMapping : Element
Site :
Container :
DesignMode : False
Expected output:
 
My questions are:
Why?
How can I prevent this output from going out to the console with the rest of my output?

Answer 1

TLDR: Add [void] like this
[void]$table.Columns.Add("NewFieldName")
Why? Because PowerShell tends to output the command's return value/object to the console (or whatever is receiving the output) by default.
How can I prevent this output from going out to the console with the rest of my output? Thank you to #PetSerAl for pointing out the solution of adding [void] to the left of the command. This casts the command's return type to a [void] which will not output to the console.
After #PetSerAl pointed me in the right direction I found these pages that helped clear things up:
Into the [void]
Gotcha #10 in PowerShell Gotchas