In PowerShell, you can test to see if a variable or array contains a specific piece of data. Take the following example:
$Arr1 = "PowerShell","Rocks","The","Windows","World"
If I was interested in knows if this array contained the string “rocks”, I would execute this command:
$Arr1 -contains "rocks"
The response would be True. Notice that in the array, the data is spelled with a capitol letter. The query used a lower case letter. PowerShell has a case sensitive contains operator called ccontains. When the same query is executed, but this time with ccontains, the answer returned is False. If the query was changed to
$Arr1 -ccontains "Rocks"
Then the response would be True