"Explore PowerShell" "Ten" circular statements

PowerShell, as a programmable language, has the following loop statement.

Note: This section of the content to discuss the substance more biased in the design aspect, so do not do too much detail in this, only for the application of PowerShell specific explanation.

for (initial value; expression; assignment statement) {code} controlling execution times with variable values

foreach (member variable in array) {code} execute code with iteration

Foreach-object performs an operation on each object of a set of inputs

while (expression) {code} expression is true loop code execution

do {code} while (expression) is similar to while, only executes the code first, then judges the expression true and false

do {code} until (expression) executes code until the expression is false

The application of circular statement in PowerShell

Use foreach to query hardware information

Example one:

$DiskDrive=get-wmiobject　-class　Win32_DiskDrive　-namespace　root\CIMV2

foreach　($item　in　$DiskDrive)
{
write-host　"Description:"　$item.Description
write-host　"Device　ID:"　$item.DeviceID　　
write-host　"Interface　Type:"　$item.InterfaceType
write-host　"Media　Type:"　$item.MediaType
write-host　"Model:"　$item.Model
write-host　"Partitions:"　$item.Partitions
write-host　"Size:"　$item.Size
write-host　"Status:"　$item.Status
}

Run Result: