2.4   Boolean logic

What you should know

Self Marking Quiz

• why data is represented in computer systems in binary form

  • • Because computers will store data and process instructions in binary form

• simple logic diagrams using the operations AND, OR and NOT - see slide

• combining Boolean operators using AND, OR and NOT to two levels

• truth tables - see slides file here

• applying logical operators in appropriate truth tables to solve problems

• applying computing-related mathematics:

  • • •  +    add

      •  -     subtract

      • /      divide

      • *     multiply

      • ^     Exponentiation (ie 10^2 is 100)  

      • DIV   (divide and give the whole number part eg 10 div 3 returns 3)  

      • MOD   (short for modulo. Divide and just give the remainder part -  10 MOD 3 gives 1, 10 MOD 2 gives 0)