Mastering Windows PowerShell Scripting - Third Edition

Assign, add and assign, and subtract and assign

The assignment operator (=) is used to assign values to variables and properties, for example, let's look at assigning a value to a variable:

$variable = 'some value' 

Or, we might change the PowerShell window title by assigning a new value to its property:

$host.UI.RawUI.WindowTitle = 'PowerShell window' 

The add and assign operator (+=) operates in a similar manner to the addition operator. The following example assigns the value 1 to a variable, then += is used to add 20 to that value:

$i = 1 
$i += 20 

The preceding example is equivalent to writing the following:

$i = 1 
$i = $i + 20 

The += operator may be used to concatenate strings:

$string = 'one' 
$string += 'one' 

As we saw with the addition ...