Selection Iteration Datatypes

Page 1

Notes

An Algorithm is a finite set of instructions to solve a problem or complete a task.

Algorithms can be written in Structured English, Pseudocode and in Flow charts.

Selection

Selection allows your program to make choices according to criteria.

Selection e.g

Is user>15 years

if yes - They can watch film

if not - no film

Iteration

Loops are used to repeat program instruction until a condition is met

Loop e.g

Enter Password

Loop Until

Correct password is entered

Data types

integer - Number without decimals (Whole Numbers)

real/float - Number with decimals (Numbers with Fractional parts)

Boolean - True or False, Yes or no

Character - Letters used

String - Words used by “Speech marks”