C Sharp (C#) - Strings and StringBuilder
What does the
IndexOf method return if the searched substring is not found in a string?What does the IndexOf method return if the searched substring is not found in a string?
easy🧠 Conceptual Q11 of 15
Step-by-Step Solution
Solution:
Step 1: Understand
TheIndexOfbehaviorIndexOfmethod returns the zero-based index of the first occurrence of the substring if found.Step 2: Check return value when substring is missing
If the substring is not found,IndexOfreturns -1 to indicate absence.Final Answer:
-1 -> Option BQuick Check:
IndexOfreturns -1 if substring missing [OK]
Quick Trick: Remember: Not found means -1 from IndexOf [OK]
Common Mistakes:
MISTAKES- Thinking it returns 0 when not found
- Expecting null instead of -1
- Assuming it throws an error if missing
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