The "=" sign is always an assignment and never an equivalence test, right?

PowerShell Help
1

To test a variable’s value, you would always use “-eq” right? You would never use “=”, right? I believe that “=” in PowerShell 4 is always an assignment operator.

2

In all versions of PowerShell that is the case. You can use “=” in an if statement and it doesn’t generate an error. Instead it will do the assignment and the ‘if’ result will always be $true.

3

= has always been the assignment operator in PowerShell and
-eq has always been the equality comparison operator

for more information on operators see the following help files
about_Arithmetic_Operators
about_Assignment_Operators
about_Comparison_Operators
about_Logical_Operators
about_Operators
about_Type_Operators