Program Coding

Program = Sequence of Instructions

• Information-processing instructions
  
  Variable assignments
  Arithmetic expressions
  Input and output
  ...
  
  
  
• Control instructions
  
  Sequential structures
  Sequence of statements executed one after another, in order
  
  Selective structures
  Test for a condition with alternative paths for program flow
  
  Repetitive structures
  Repeated execution of program statements while some condition holds