what are switch statements used for C++ code example

Example 1: c++ switch case statement

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
}

Example 2: c++ switch case

switch(expr) {
  case 1:
    // do something
    break;
  case 2:
    // do something
    break;
  default:
    // do something
}