Switch Statement

A switch statement is a control flow construct in programming used to execute one block of code out of multiple possible options, based on the value of a single variable or expression. It's a more structured and readable alternative to using multiple if-else statements when comparing the same value to several possible options.

main

switch


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#include <iostream>

int main()
{
    // Example user choice: 1 for Check Balance, 2 for Deposit, etc.
    int userOption = 1; 

    // Simulating a banking system menu using a switch statement
    switch (userOption)
    {
        case 1: // Check account balance
            std::cout << "Checking account balance..." << std::endl;
            break;

        case 2: // Deposit money
            std::cout << "Depositing money into your account..." << std::endl;
            break;

        case 3: // Withdraw money
            std::cout << "Withdrawing money from your account..." << std::endl;
            break;

        case 4: // Exit
            std::cout << "Exiting the system. Thank you for banking with us!" << std::endl;
            break;

        default: // Invalid option
            std::cout << "Invalid option. Please choose a valid menu option." << std::endl;
            break;
    }
}

break - statement means an exit from a block of code;
default - is an optional part but a useful one. This part will be executed if none of the cases doesn't fit.

We check the userOption variable. If it equals 1, the corresponding text for checking the account balance will be displayed. The break statement ensures that the program exits the entire switch-case block after processing this case, preventing the execution of other cases.

The break keyword

However, there is an important aspect of the switch statement to keep in mind. If the break statement is intentionally removed from a case, the program will continue executing subsequent cases, even if their conditions do not match. This behavior, known as fall-through, can be useful in specific scenarios but may lead to unexpected results if not used carefully.

main


              1234567891011121314151617181920212223242526
            
#include <iostream>

int main()
{
    // Example user choice: 1 for Check Balance, 2 for Deposit, etc.
    int userOption = 1; 

    // Simulating a banking system menu using a switch statement
    switch (userOption)
    {
        case 1: // Check account balance
            std::cout << "Checking account balance..." << std::endl;

        case 2: // Deposit money
            std::cout << "Depositing money into your account..." << std::endl;

        case 3: // Withdraw money
            std::cout << "Withdrawing money from your account..." << std::endl;

        case 4: // Exit
            std::cout << "Exiting the system. Thank you for banking with us!" << std::endl;

        default: // Invalid option
            std::cout << "Invalid option. Please choose a valid menu option." << std::endl;
    }
}

Without the break command, the program flow will ignore all the following checks and simply execute the commands of the following cases until it encounters the break statement or the end of the entire switch block.

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Section 4. Chapter 3

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Course Content

C++ Introduction

1. Getting Started

Introduction to C++ Programming Entry Point of a C++ Program Understanding the Standard Library and Files in C++Exploring C++ Preprocessor Directives Writing Your First C++ Program

2. Introduction to Operators

Mastering C++ Operators Arithmetic Operators Practice Relational Operators Logical Operators

3. Variables and Data Types

Data Types Understanding Variables Numerical Data Types Introduction to String Introduction to Arrays Working with the Array

4. Introduction to Program Flow

Conditional Statements Ternary Operator Switch Statement While Loop For Loop Practicing With Loops

5. Introduction to Functions

What are Functions?Type of Functions Return Statement in Functions Simple Function Practice

Switch Statement

main

switch


              12345678910111213141516171819202122232425262728293031
            
#include <iostream>

int main()
{
    // Example user choice: 1 for Check Balance, 2 for Deposit, etc.
    int userOption = 1; 

    // Simulating a banking system menu using a switch statement
    switch (userOption)
    {
        case 1: // Check account balance
            std::cout << "Checking account balance..." << std::endl;
            break;

        case 2: // Deposit money
            std::cout << "Depositing money into your account..." << std::endl;
            break;

        case 3: // Withdraw money
            std::cout << "Withdrawing money from your account..." << std::endl;
            break;

        case 4: // Exit
            std::cout << "Exiting the system. Thank you for banking with us!" << std::endl;
            break;

        default: // Invalid option
            std::cout << "Invalid option. Please choose a valid menu option." << std::endl;
            break;
    }
}

break - statement means an exit from a block of code;
default - is an optional part but a useful one. This part will be executed if none of the cases doesn't fit.

The break keyword

main


              1234567891011121314151617181920212223242526
            
#include <iostream>

int main()
{
    // Example user choice: 1 for Check Balance, 2 for Deposit, etc.
    int userOption = 1; 

    // Simulating a banking system menu using a switch statement
    switch (userOption)
    {
        case 1: // Check account balance
            std::cout << "Checking account balance..." << std::endl;

        case 2: // Deposit money
            std::cout << "Depositing money into your account..." << std::endl;

        case 3: // Withdraw money
            std::cout << "Withdrawing money from your account..." << std::endl;

        case 4: // Exit
            std::cout << "Exiting the system. Thank you for banking with us!" << std::endl;

        default: // Invalid option
            std::cout << "Invalid option. Please choose a valid menu option." << std::endl;
    }
}

Everything was clear?

Thanks for your feedback!

Section 4. Chapter 3