The if-else-Statement

1. The syntax of the if-else-statement is:
   
   if (Boolean_Expression)
       Yes_statement
   else
       No_statement
   
   The Boolean expression is first evaluated to see if it is true or false. If it is true then the Yes_statement is executed and then the No-statement is skipped, otherwise the Yes_statement is skipped and the No-statement is executed. In either case control is passed on to the statement that follows the if-else--block. Again compound statements can be used instead of single Yes_statement or No_statement.
   
   
2. The else part of an if-else statement is actually optional, which when left out simply gives the if statement.
   
   
3. For example, the following code:
   
   float LargeBonus = 230.00, SmallBonus = 130.00;
   if (number_of_sales > target)
   {
       Salary += LargeBonus;
       cout << "What a superb job you are doing!\n";
   }
   else
   {
       Salary += SmallBonus;
       cout << "What a fine job you are doing!\n";
   }
   cout << "Salary = " << Salary << endl;
   
   adds a large bonus money of 230 dollars to the salary and prints out a very nice comment if the number of sales exceed the target number, otherwise a small bonus money of 130 is added and a nice comment is printed out. In any case the actual salary is always printed out.