C++ In a Nutshell

Name

default keyword — Catch-all label in switch statement

Synopsis

               statement := default : statement
            

A switch statement jumps to the default label if no case matches the switch expression. A switch statement can have at most one default label. If there is no default and the expression does not match any cases, control jumps directly to the statement that follows the switch statement.

Example

switch(c) {
case '+': ... break;
case '-': ... break;default:
  cerr << "unknown operator: " << c << '\n';
  break;
};

See Also

break, case, statement, switch, Chapter 4