🔴 Advanced · Lesson 52

Exception Handling

What is Exception Handling?

Exception Handling
Exception handling manages runtime errors using try, throw and catch. It helps separate error handling from normal program logic.

Level
🔴 STL, Modern C++ and Projects

Example File
exception-handling.cpp

Main Focus
Concept + syntax + practical C++ program

Why should you learn this?

It helps you write correct and readable C++ programs.
It is used repeatedly in school practicals, projects and competitive programming.
It builds the base for advanced topics such as OOP, STL and data structures.

Important Terms

Term	Meaning / Use
try	Try used in Exception Handling programming.
throw	Throw used in Exception Handling programming.
catch	Catch used in Exception Handling programming.
runtime error	Runtime error used in Exception Handling programming.
exception	Exception used in Exception Handling programming.

Syntax / Pattern

try { throw value; } catch(type e) { handle; }

Example Program

#include <iostream>
using namespace std;
int main(){
    int b = 0;
    try{
        if(b == 0) throw "Division by zero";
    } catch(const char* msg){
        cout << msg;
    }
    return 0;
}

Expected Output

Division by zero

Program Explanation

throw sends an exception.
catch receives and handles it.

Exam Tip: In C++ practical answers, write the logic first, then the program, then expected output. For theory, always include one suitable example.

Where will you use it?

file errors
invalid input
banking applications

Common Mistakes

Using exceptions for normal if-else logic.
Catching wrong exception type.

Practice Tasks

Handle invalid age exception.
Explain try-catch flow.

Summary

Exception Handling is an important C++ topic. Learn the definition, understand the syntax, run the example program and then solve the practice tasks to make the concept strong.