15. Order of Precedence Example

• Code that calculates a discounted price using the default order of precedence:

  
  double discountPercent = .2;            // 20% discount
  double price = 100;                     // $100 price
  price = price * 1 - discountPercent;    // price = $99.8
  
  

• The above formula is incorrect, because multiplication has higher precedence than addition.

• Using parentheses that specify the order of precedence remedies the problem:

  
  price = price * (1 – discountPercent);  // price = $80