Computational thinking

Computational thinking

1. Logic

   • Used to work out whether something is true or false
   • ON = 1 and OFF = 0
   • The outputs are shown in a truth table
   • A truth table shows the output based on the inputs

2. NOT gate

   • Has 1 input
   • It inverts/swaps the input
   • ¬A(NOT A), Truth table or
   • It can be written as:

3. OR gate

   • It has an output of 1 if either A or B is 1
   • A V B (A or B), Truth table or
   • It can be written as:

4. AND gates

   • Only has an output of 1 if both A and B are 1

5. Combining logic gates

   • You may be given a logic statement: A n (B V C)
   • Always draw a logic diagram first
   • You then draw a truth table after the diagram and like math's you start with the brackets

6. Arithmetic operators

   • + = Addition
   • - = subtraction
   • / = Division
   • * = multiplecation
   • MOD = Modules
     • Returns the remainder after a division
   • DIV = Quotient
     • Returns whole number after division
   • ^ = Exponentiation
     • One value to the power of another

7. Comparison operators

   • == is equal to
   • != not equal to
   • < less than
   • > more than
   • <= less than or equal to
   • >= greater than or equal to

8. Boolean operators

   • AND if two or more statements are TRUE
   • OR if either statement is true
   • NOT reverse the logic result

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