C Sharp (C#) - Exception Handling
You want to read a number from user input and handle errors if the input is not a number. Which code snippet correctly uses exception handling to do this?
You want to read a number from user input and handle errors if the input is not a number. Which code snippet correctly uses exception handling to do this?
hard🚀 Application Q15 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand the goal
We want to read a number and catch errors if input is not a valid number.Step 2: Check each option for correct exception handling
try { int num = int.Parse(Console.ReadLine()); Console.WriteLine($"You entered {num}"); } catch (FormatException) { Console.WriteLine("Please enter a valid number."); } usestrywithint.Parseand catchesFormatException, which is correct. int num = int.Parse(Console.ReadLine()); Console.WriteLine($"You entered {num}"); has no error handling. try { int num = Console.ReadLine(); Console.WriteLine($"You entered {num}"); } catch (Exception) { Console.WriteLine("Error occurred."); } tries to assign string to int without parsing. try { int num = Convert.ToInt32(Console.ReadLine()); } finally { Console.WriteLine("Input processed."); } uses finally but no catch, so errors are not handled.Final Answer:
try { int num = int.Parse(Console.ReadLine()); Console.WriteLine($"You entered {num}"); } catch (FormatException) { Console.WriteLine("Please enter a valid number."); } -> Option AQuick Check:
Try-catch with int.Parse and FormatException = A [OK]
Quick Trick: Use try-catch around int.Parse to catch invalid input [OK]
Common Mistakes:
MISTAKES- Not using try-catch for parsing input
- Assigning string directly to int variable
- Using finally without catch to handle errors
Master "Exception Handling" in C Sharp (C#)
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