Can't get my board to read inputs from a switch and output on a 7-segment LCD.

Projects Programming
3 
  else if (digitalRead (pin1) == LOW and         //Code to display 4
      digitalRead (pin2) == LOW and
      digitalRead (pin3) == HIGH and
      digitalRead (pin4) == LOW)
...

It is a bad practice to use single capital letters as identifiers.

const int F = 6;