2.4 (Computational Logic)

2.4 (Computational Logic)

1. Binary

   • It is the representation of the 'presence' of electricity
     • If present or 'on' we use 1
     • If absent or 'off' we use 0
   • It is used to change bits and perform calculations within a computer

2. AND Gate

   • Only has an output of 1 if A & B are 1
   • Written as A^B

3. OR Gate

   • Output of 1 if either of A or B are 1
   • Written as AvB

4. NOT Gate

   • Only has 1 input, it inverts the input
   • Written as ¬A

5. Truth Tables

   • Outputs of logic gates can be shown through a truth table
   • It shows what an output will be, based on inputs