Sequence and Selection

Sequence and Selection

1. Programming constructs

   • sequence
     • The statements are executed in the order they are written
   • selection
     • A decision within a computer program when the program decides to move on based on the results of an event
   • iteration
     • A single pass through a set of instructions
       • repetition
     • FOR...ENDFOR
       • used when you know how often the code must be repeated
     • WHILE...ENDWHILE
       • it is a condition control loop
       • does something when a set condition is true
     • REPEAT...UNTIL
       • some languages (e.g. python) do not have this statement
       • the condition is checked at the end

2. Boolean

   • Programs use simple comparisons to help make decisions. Boolean logic is a form of algebra where all values are either True or False.
   • These values of true and false are used to test the conditions that selection and iteration are based around

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