C++ switch

Hi everyone, inside this article we will see about C++ switch Statement.

The switch statement is a control structure in C++ is used to perform multiple actions based on multiple cases. It’s a multi-way branch statement that tests a value against a list of cases, and executes the first matching case.

Syntax & Explanation

The syntax is as follows:

switch (expression) {
  case constant-expression :
    statement(s);
    break;
  case constant-expression :
    statement(s);
    break;
  ...
  default :
    statement(s);
}

Where expression is any expression that returns an integral or enumeration type, constant-expression is a constant expression of the same type as expression, and statement(s) is one or more statements. The break statement is used to exit the switch statement. If no break statement is encountered, the flow of control will fall through to the next case. The default case is optional and executed when no other case matches.

Here, a pictorial representation of switch case statement:

A Basic Program

Here is an example of a switch statement in C++:

#include <iostream>
using namespace std;

int main() {
  int day = 3;
  switch (day) {
    case 1:
      cout << "Monday" << endl;
      break;
    case 2:
      cout << "Tuesday" << endl;
      break;
    case 3:
      cout << "Wednesday" << endl;
      break;
    case 4:
      cout << "Thursday" << endl;
      break;
    case 5:
      cout << "Friday" << endl;
      break;
    case 6:
      cout << "Saturday" << endl;
      break;
    case 7:
      cout << "Sunday" << endl;
      break;
    default:
      cout << "Invalid day" << endl;
  }
  return 0;
}

Output

Wednesday

This program outputs Wednesday to the console, as day is equal to 3.

We hope this article helped you to understand about C++ switch in a very detailed way.

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