Nested switch statement in C++

Switch-case statements: These are a substitute for long if statements that compare a variable to several integral values

• The switch statement is a multiway branch statement. It provides an easy way to dispatch execution to different parts of code based on the value of the expression.
• Switch is a control statement that allows a value to change control of execution.

Syntax:

switch (n) { case 1: // code to be executed if n = 1; break; case 2: // code to be executed if n = 2; break; default: // code to be executed if // n doesn't match any cases }

Nested-Switch Statement: Nested-Switch statements refers to Switch statements inside of another Switch Statements. Syntax:

switch(n) { // code to be executed if n = 1; case 1: // Nested switch  switch(num)   {  // code to be executed if num = 10  case 10:   statement 1;  break;    // code to be executed if num = 20  case 20:   statement 2;  break;    // code to be executed if num = 30  case 30:   statement 3;  break;    // code to be executed if n   // doesn't match any cases  default:   }   break; // code to be executed if n = 2; case 2: statement 2; break; // code to be executed if n = 3; case 3: statement 3; break; // code to be executed if n doesn't match any cases default: }

Example: 

// Following is a simple program to demonstrate // syntax of Nested Switch Statements. #include <iostream> using namespace std; int main() {  int x = 1, y = 2;  // Outer Switch  switch (x) {  // If x == 1  case 1:  // Nested Switch  switch (y) {  // If y == 2  case 2:  cout << "Choice is 2";  break;  // If y == 3  case 3:  cout << "Choice is 3";  break;  }  break;  // If x == 4  case 4:  cout << "Choice is 4";  break;  // If x == 5  case 5:  cout << "Choice is 5";  break;  default:  cout << "Choice is other than 1, 2 3, 4, or 5";    }  return 0; } 

Choice is 2