Creating software

Creating software

1. IDE

   • PyCharm
   • PyScripter
   • Python IDLE
     • Editor
       • Run time environment
         • Allows you to run your code quickly so that you can test to see that it works.
         • This is used during iterative testing (Testing when you are developing the program).
         • Allows you to run your code quickly so that you can test to see that it works.
         • This is used during iterative testing (Testing when you are developing the program).
       • Colour codes command words
       • Some also autocomplete code as you type it
       • Auto indents code
       • Colour codes command words
       • Auto indents code
       • Some also autocomplete code as you type it
       • translator
         • When you run the code, a translator (such as an interpreter) is used to translate the high level code into low level code.
     • Error diagnostics
       • Used to debug your code. It locates errors and suggests ways in which to fix it.
   • 4 Main Features
     • Translators (Compiler and Interpreter)
     • Run Time Environment
     • Editor
     • Error Diagnostics (Debugging tools)

2. Generation of Languages

   • 1st Generation
     • Machine code (1s and 0s)
   • 2nd Generation
     • Assembly language: uses a simple command for each collection of 1s and 0s.
     • Uses an assembler to convert to machine code
     • One assembly code command = One machine code instruction
   • 3rd Generation
     • A high level language e.g. Python.
     • Compiled or interpreted
     • One high level instruction = many machine code instructions
   • 4th Generation
     • Known as a Declarative language
     • Facts and rules are stated e.g. SQL or Prolog (an A.I. Language)