🔴 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	Exception Handling programming में Try use होता है।
throw	Exception Handling programming में Throw use होता है।
catch	Exception Handling programming में Catch use होता है।
runtime error	Exception Handling programming में Runtime error use होता है।
exception	Exception Handling programming में Exception use होता है।

Syntax / Pattern

C++

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

Example Program

main.cpp

#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 एक ज़रूरी C++ topic है। परिभाषा सीखें, syntax समझें, example program चलाएं और फिर practice tasks हल करके concept मज़बूत करें।