Regular expressions with -match in PowerShell - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the -match operator do in PowerShell?

It checks if a string matches a pattern defined by a regular expression and returns True or False.

beginner

How do you capture the matched text when using -match?

PowerShell stores the matched text in the automatic variable $Matches.

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What will this command output?<br>

$text = 'Hello123'; $text -match '\d+'

It will output True because \d+ matches one or more digits in the string.

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How can you check if a string does NOT match a regex pattern in PowerShell?

Use the -notmatch operator, which returns True if the string does NOT match the pattern.

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What type of value does -match return?

It returns a Boolean value: True if the pattern matches, otherwise False.

What does $string -match 'abc' return if $string contains 'xyzabc123'?

A Null

B False

C An error

D True

The string contains 'abc', so -match returns True.

Where does PowerShell store the matched text after using -match?

A $MatchText

B $MatchedString

C $Matches

D $Match

PowerShell stores matched groups in the automatic variable $Matches.

What will 'PowerShell' -match '^Power' return?

A True

B Null

C An error

D False

The pattern '^Power' matches the start of the string 'PowerShell', so it returns True.

Which operator checks if a string does NOT match a regex pattern?

A -notmatch

B -match

C -contains

D -like

-notmatch returns True if the string does NOT match the regex.

What type of pattern does -match use?

A Wildcard pattern

B Regular expression

C Exact string match

D JSON pattern

-match uses regular expressions to find patterns in strings.

Explain how to use the -match operator in PowerShell to find if a string contains digits.

Think about how to write a regex for digits and how to check the result.

Describe the difference between -match and -notmatch in PowerShell.

Consider what happens when the pattern is found or not found.