PowerShell - Special Characters

This blog post is about special characters and tokens that we can use in PowerShell. I have listed  some of them and use of those characters and tokens with examples

• $ : This Dollar mark use to declare a variable

      Eg: $number = "333"

• $?: The Dollar mark and the question mark together use to indicating whether the previous command has an error or not by returning 'True' of 'False' as the output.

      Eg: See if a PowerShell cmdlet is existing in the system

• | : The pipeline uses to get the output of the first command and pass it to another command to get the result.

      Eg: Get a list of processes and display the first 5 processes of the list

• .. : Double dots use to specify a range. This can be use instead of foreach loop

      Eg: print numbers from 1 to 10 (1..10)

• :: : The double colon use to refer a static member of a class

      Eg: Compare the two numbers "22" and "33" and gives 'False' as the output

• % : The percentage mark acts as the MOD 

      Eg: 5%2 gives 1 as the output

• ? : Question mark gives all the items which confirm the condition. This is same as 'where' 

     Eg: Print odd numbers between 1to 5

• # : Single line comment

      Eg: #This is a single line comment

• <# .. #> : This is for Multi- line comment

     Eg: <# this is a
           Multi-line
           comment#>

• & : Ampersand use to execute a string as command

     Eg: & "Get-Process"