Constant variables can be created in CPP

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• Nihal   -Posted on 08 Oct 15
  You can declare constant variable by using enum, const, #define.
  enum Color { RED, GREEN, BLUE };
  int main() {
  
  Color c;
  
  c = RED;
  cout << "RED = " << c << endl;
  
  c = GREEN;
  cout << "GREEN = " << c << endl;
  
  c = BLUE;
  cout << "BLUE = " << c << endl;
  
  return 0;
  }
  
  
  Output:
  RED = 0
  GREEN = 1
  BLUE = 2
  const keyword is used to make a variable constant. You cannot change its value.
  .Another mechanism to define constant values is the use of preprocessor
  #define PI 3.14159
  

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