C++ switch statement

The switch statement in C++ is used to select one of many code blocks to be executed based on the value of an expression. It’s typically used when you need to compare a variable against multiple possible values, making your code cleaner and more readable than using multiple if-else statements.

Note :- A switch-statement can alternatively be written as a set of if-statements.

Syntax:

switch (expression) {
    case value1:
        // code to be executed if expression == value1
        break;
    case value2:
        // code to be executed if expression == value2
        break;
    // additional cases as needed
    default:
        // code to be executed if expression doesn't match any case
}

Explanation:

• expression: This is the value or variable that you want to test.
• case value: Each case represents a potential match. If the expression matches the value, the corresponding block of code is executed.
• break: After executing a case, the break statement is used to exit the switch block. If you omit the break, the code will “fall through” to the next case.
• default: This is an optional block that executes if none of the case values match the expression.

Example:

#include <iostream>
using namespace std;

int main() {
    int day = 2;

        switch (day)
        {
            case 1:
                cout << "Monday"<< endl;
                break;
            case 2:
                cout << "Tuesday"<< endl;
                break;
            case 3:
                cout << "Wednesday"<< endl;
                break;
          
            default:
                cout << "Invalid day"<< endl;
                break;
        }
   return 0;
}

Output:

Example:

#include <iostream>
using namespace std;

enum Day { Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday };

int main() {
    Day today = Friday;  // No need for 'Day.' here

    switch (today) {
        case Monday:
            cout << "Start of the work week!" << endl;
            break;
        case Friday:
            cout << "End of the work week!" << endl;
            break;
        default:
            cout << "It's a regular day." << endl;
            break;
    }

    return 0;
}

Output:

C++ switch statement – Questions and Answers

C++ switch statement – Objective Questions (MCQs)

int x = 2;
switch(x) {
case 1: cout << "One"; break;
case 2: cout << "Two"; break;
default: cout << "Other";
}

Related C++ switch statement Topics