[Solved] Why does this Ruby code raise an error?regex = /\w+{2,4}/ "test" =~ regex — Ans: Quantifier {2,4} is incorrectly applied to \w+ | Ruby

Ruby - Regular Expressions

Why does this Ruby code raise an error?

regex = /\w+{2,4}/
"test" =~ regex

AQuantifier {2,4} is incorrectly applied to \w+

BMissing escape for +

CRegex delimiters are wrong

DNo error, code runs fine

Step-by-Step Solution

Solution:

Step 1: Analyze quantifier usage in regex
\w+ means one or more word characters. Applying {2,4} directly after + is invalid because + is already a quantifier.
Step 2: Understand correct quantifier placement
Quantifiers cannot be stacked like \w+{2,4}. Instead, use \w{2,4} to match 2 to 4 word characters.
Final Answer:
Quantifier {2,4} incorrectly applied after + quantifier -> Option A
Quick Check:
Quantifiers cannot stack like +{2,4} [OK]

Quick Trick: Don't stack quantifiers like +{2,4} in regex [OK]

Common Mistakes:

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