In c/c++ statements can be grouped into a single statement using a code block or “curly braces”. The most common use of a code block is to extend the content of the body of a control structure to include more than one statement.

The syntax for an if statement is

   if (boolean expression) statement;

Using a code block this is extended to

   if (boolean expression) {
       statement1;
       statement2;
       ...
       statementn;
   }