Script block
A script block is a PowerShell construct that groups executable statements within braces for storage, invocation, or deferred execution as a unit.
Learn PowerShell in a Month of Lunches: Fourth Edition, Covers Windows, Linux, and macOS
A script block is a PowerShell language construct that groups executable statements inside braces for invocation or deferred execution.
- How it is used
- Deploys grouped commands for filtering, per-object processing, calculated properties, remoting, jobs, and deferred invocation.
- How deep it goes
- Explains braces, $_, invocation, and common command parameters, then extends processing to parallel execution and throttle limits.
- Examples
- Demonstrates process reporting, CSV-derived user properties, Azure Key Vault creation, array iteration, and parallel timing.
- What you can do after
- Builds reusable command groups and applies them to pipeline objects through ForEach-Object, $_, and the call operator.
Learn PowerShell Scripting in a Month of Lunches, Second Edition: Write and organize scripts and tools
A script block is a grouped sequence of PowerShell statements enclosed in braces that can be executed as a unit.
- How it is used
- Uses grouped statements to implement conditional decisions, iteration, case selection, and repeated execution in PowerShell.
- How deep it goes
- Defines syntax and execution behavior across four constructs, but defers deeper script-block internals.
- Examples
- Demonstrates conditional branches, service iteration, wildcard switch matching, and repeated loops.
- What you can do after
- Apply it via PowerShell control-flow constructs to group actions, process collections, select cases, and repeat operations.
Practical Automation with PowerShell: Effective scripting from the console to the cloud
A script block is a PowerShell expression that groups commands and can be passed, stored, or invoked as a unit.
- How it is used
- Uses deferred PowerShell code to generate files and register per-user Active Setup actions.
- How deep it goes
- Explains declaration, deferred execution, string conversion, and function passing, but stops short of execution-context internals.
- Examples
- Demonstrates deferred Git configuration passed to New-ActiveSetup and written into a versioned ProgramData script.
- What you can do after
- Build reusable deferred automation by storing command groups, passing them to functions, and serializing them into script files.
Related concepts
- -scriptblockused by · -ScriptBlock is an Invoke-Command parameter that specifies executable PowerShell statements to run remotely.
- loopused by · A loop is a programming control-flow construct that repeatedly executes a block of instructions according to an iteration rule or continuation condition.
- ValidateScript attributeused by · The ValidateScript attribute validates a PowerShell parameter by evaluating a script block against its supplied value.
- placeholderuses · A placeholder is a temporary or symbolic stand-in for a value, content, component, or position that is supplied, replaced, or resolved later.
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