Multiple catch blocks in C Sharp (C#) - Mini Project: Build & Apply

Handling Errors with Multiple Catch Blocks in C#

📖 Scenario: Imagine you are writing a simple calculator program that divides two numbers. Sometimes, users might enter zero as the divisor or enter invalid input. You want to handle these errors gracefully.

🎯 Goal: Build a C# program that uses try with multiple catch blocks to handle different types of errors separately.

📋 What You'll Learn

Create two integer variables named numerator and denominator with exact values.

Create a try block to perform division.

Add two catch blocks: one for DivideByZeroException and one for FormatException.

Print the result or error messages accordingly.

💡 Why This Matters

🌍 Real World

Handling errors gracefully is important in real-world programs to avoid crashes and give users helpful messages.

💼 Career

Understanding multiple catch blocks is essential for writing robust C# applications that handle different error types properly.

1

Create numerator and denominator variables

Create two integer variables called numerator and denominator with values 10 and 0 respectively.

C Sharp (C#)

# Your code here

Need a hint?

Use int numerator = 10; and int denominator = 0; to create the variables.

2

Add a try block to divide numerator by denominator

Add a try block that attempts to divide numerator by denominator and stores the result in an integer variable called result.

C Sharp (C#)

int numerator = 10;
int denominator = 0;

// Add try block below
# Your code here

Need a hint?

Use try { int result = numerator / denominator; } to catch errors during division.

3

Add multiple catch blocks for DivideByZeroException and FormatException

Add two catch blocks after the try: one catching DivideByZeroException that prints "Cannot divide by zero.", and another catching FormatException that prints "Invalid input format.".

C Sharp (C#)

int numerator = 10;
int denominator = 0;

try
{
    int result = numerator / denominator;
}

// Add catch blocks below
# Your code here

Need a hint?

Use two separate catch blocks for each exception type with the exact messages.

4

Print the result if division succeeds

Inside the try block, after dividing, add a Console.WriteLine to print "Result: " followed by the result variable.

C Sharp (C#)

int numerator = 10;
int denominator = 0;

try
{
    int result = numerator / denominator;
    // Print the result below
    # Your code here
}
catch (DivideByZeroException)
{
    Console.WriteLine("Cannot divide by zero.");
}
catch (FormatException)
{
    Console.WriteLine("Invalid input format.");
}

Need a hint?

Use Console.WriteLine("Result: " + result); inside the try block.