8. PowerShell-Basic overview, variables, character and string manipulation, operator operations

• PowerShell Basic outline of the script

1. 2. constants, use of variables

   4. Operations on various strings

   6. Operations on operators

   8. arrays, hash tables: creating, modifying merged arrays and hash tables

   10. Conditional judgment:If, switch statement

   12. Logical judgment: Using operators to judge

   14. loop control:while, Do...while, do ... until, For,foreach statements

   16. Modular: organize and adjust code; Use the exact data type to invoke other script functions

   18. WMI object:

       The WMI namespace concept,WMI provides the functionality to view and use the WMI namespace.

       WMI class:get-wmiobject; Enquiry Wmi

   20. ADSI Object

       the concept of Active Directory objects;

       the functionality that ADSI provides;

       Active Directory namespace;

       Create and modify ActiveDirectory Object

Reference: http://marui.blog.51cto.com/1034148/291383

• PowerShell the variable

2. Assignment of variables:

   $STR = "123"

   or set-variable-name str–value "123"

4. when declaring variables, avoid some "system reserved words", such as:

   Break | Continue | do | else | ElseIf |filter | foreach | function | If | In | return | Switch | Until | where | While

6. Output variables

   Write-output $str

   or enter $STR directly

• Characters and strings for PowerShell

  1. The following are common data type descriptions for PowerShell:

Hashtable : Hash Table

BOOL : true , false

XML : XML Object

Array : Array

decimal : decimal number, 128bit

byte : unsigned characters, 8bit

Char : Unicode encoded characters, 16bit

string : Unicode encoded string

Single : Single Precision 32bit floating point

Double : Double Precision 64bit floating point

Long : Signed, 64bit

int: There are symbols, 32bit

$strA = "Hello" <enter>

$strB = "world!" <enter>

$strC = $strA + $strB <enter>

$strC <enter> Results: "Hello world!"

String substitution:

$strA = "hi! world! "<enter>

$strB = $strA-replace "hi!", "Hello" <enter>

$strB <enter> Results: "hi!,world!"

String reference:

$strA = "ABC" <enter>

"This is $strA." <enter> Results: "Thisis ABC"

' This is $strA. ' <enter> Results: "This is $strA"

• PowerShell operator operation (+,-, *,/,%,=,++,-- )

5 + <enter>

$x =200+1 <enter>

$x <enter>

[int] $y = (7 + * 2)/10<enter>

$y <enter> Results: 3

Reference: http://marui.blog.51cto.com/1034148/291383

This article comes from the "Ricky's blog" blog, please be sure to keep this source http://57388.blog.51cto.com/47388/1639140

8. PowerShell-Basic overview, variables, character and string manipulation, operator operations