PowerShell - String Operations
Which of the following PowerShell commands correctly checks if the variable
$input contains any numeric digits using -match?Which of the following PowerShell commands correctly checks if the variable $input contains any numeric digits using -match?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Identify regex for digits
The regex\dmatches any single digit character.Step 2: Analyze options
if ($input -match '\d') { 'Digits found' } uses\dcorrectly. if ($input -match '[0-9]+') { 'Digits found' } uses[0-9]+which also matches digits but the question asks for any digits, so\dis simpler and correct. if ($input -match '[a-z]') { 'Digits found' } matches letters, not digits. if ($input -match '\w+') { 'Digits found' } matches word characters including letters and digits, so it is not specific.Final Answer:
if ($input -match '\d') { 'Digits found' } -> Option AQuick Check:
Check if regex matches digits only [OK]
Quick Trick: Use \d to match digits in regex [OK]
Common Mistakes:
- Using character classes that include letters instead of digits
- Confusing \w (word chars) with digits
- Using incorrect regex syntax
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