12. Default: fixed-point notation

• Floating-point values by default use fixed-point notation:

  
      #include <iostream>
      int main()
      {
        const double PI = 3.1415926;
        std::cout << PI << '\n';
        return 0;
      }
      /*
      Output: 3.14159
      */
  
  

• fixed means no exponent; n digits after the floating-point are shown.