Must-do problems: Exception Basics

150 min · Beginner

Real programs get bad input all the time. These problems ask you to print a clear message for every bad line and keep going, never crash. Start with the easy ones, and check each program against every test before moving on.

What you will learn

Catch the right exception for bad numbers, zero divisors and wrong indexes
Use multiple catch blocks in the right order, and finally
Throw IllegalArgumentException with a clear message from your own methods
Validate every input line and keep the program running

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