Comparison operators

PowerShell has a wide variety of comparison operators:

• Equal to and not equal to: -eq and -ne
• Like and not like: -like and -notlike
• Greater than and greater than or equal to: -gt and -ge
• Less than and less than or equal to: -lt and -le
• Contains and not contains: -contains and -notcontains
• In and not in: -in and -notin

Case-sensitivity

None of the comparison operators are case sensitive by default. Each of the comparison operators has two additional variants, one which explicitly states it is case-sensitive, and another which explicitly states it is case-insensitive.

For example, the following statement returns true:

'Trees' -eq 'trees' 

Adding a c modifier in front of the operator name forces PowerShell to make a case-sensitive comparison. The following statement will return false:

'Trees' -ceq 'trees' 

In addition to this the case-sensitive modifier, PowerShell also has an explicit case-insensitive modifier:

'Trees' -ieq 'trees' 

However, as case insensitive comparison is the default...