Higher Computing Software Development -So Far- 5/10/10

ADITDEM Analysis – Program Specification Design – Pseduocode, Top down design, Bottom up Implementation – Visual Basic, Scratch Testing – Normal, Extreme & Exceptional Documentation – User guide, Technical guide Evaluation – Robust……….. Maintenance – Perfective, Corrective……

String Handling Concatenation – Joining strings together & Left, right, mid, Len function vbCrLf – new line on a string

Variables String – Text, numbers not used for calculation Numeric –Integer – whole numbers –Single – Real numbers –Boolean – true/false Array – a list of any data type Variant – data type that is not defined, its is created “on the fly” by VB Option Explicit – Gets rid of variant data types DIM – set up a variable

Selection Simple – IF with one comparator Complex – IF with more than one comparator and logic operator Else and ELIF – allows for changes in comparison SELECT CASE – Simplifies IF..ELIF..ELSE

Unconditional Loops Iteration (repetition) that happens a specific number of times. Nesting for loops For Length = 1 to 10 For Breadth = 1 to 10 Area = length * breadth Next

Conditional Loops Do...Loop Until –Loops until a condition is met –Must be executed at least once! –Condition is checked at the bottom Do While…Loop –Loops while condition is true –May never be executed if condition is false –Condition is checked at the top