2.2 programming techniques

2.2 programming techniques

1. boolean logic operators

   • bollean operators perform logic operations and allways result in true or false values the boolean operators for GCSE are
     • and-evaluates to true if both operands are true,false if eithwer operand is false
       • or-evaluates to true if both operands are true ,false if both operands are false
         • not-inverts/negates a logical value so true becomes false ansd false becomes true
   • types of iteration,definate and indefinate
     • indefinate iteration
       • a block of code that will repeat whilst a specified condition is true this is often called condition controlled
         • definate iteration - a block of code that will repeat a known number of times ths is often known as count controlled iterations and is done with FOR loops
           • subroutines
             • named mini programmes
               • easier to read ,there are fewer large blocks of code to understand
                 • more efficient -blocks of code can be used ansd written many times
                   • more reliable- each subroutine can be induvidually tested to make sure it works