PowerShell - Regular Expressions
How would you write a PowerShell regex pattern to match a string that contains exactly 2 to 4 lowercase letters anywhere, but must start and end with a digit?
How would you write a PowerShell regex pattern to match a string that contains exactly 2 to 4 lowercase letters anywhere, but must start and end with a digit?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the requirement
String must start with digit (^\d), then 2-4 lowercase letters ([a-z]{2,4}), and end with digit (\d$).Step 2: Check each option
^\d[a-z]{2,4}\d$ correctly places anchors and quantifiers; others misplace anchors or quantifiers.Final Answer:
^\d[a-z]{2,4}\d$ -> Option AQuick Check:
Anchors and quantifiers correctly combined [OK]
Quick Trick: Place anchors ^ and $ at string ends [OK]
Common Mistakes:
- Misplacing anchors inside pattern
- Using + instead of exact quantifier
- Confusing order of characters
Master "Regular Expressions" in PowerShell
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