Algorithms, design & provlem solving (paper 2)

analysis design coding testing

breaking down a complex problem into smaller, manageable parts which are easier to solve

• identify main problem • identify the componenet parts of inputs, processes, outputs and storage • list the main sub-problems, sub-systems or sub-tasks • break these down into smaller sub-problems and sub-tasks which can be completed

to show the structure of a problem, its subsections and links to other subsections

simplifing a porblem so it is easier to be deal with

to develop solutions to a problem

they di not usually translate very easily into program code

because it is easier for someone to understand - they can focus on the process needed rather than the coding itself

an arrow <-

less than

greater than

not equal to

• integer • real • boolean • char • string

a whole number

a number with a decimal point

true or false

a single alphabetic or numeric character

a sequence of one or more characters

a variable can be changed/updated/edited after exercution but a constant stores a value that cannot be changed after exercution

• sequence (inputs, outputs, assignment) • iteration (loops) • selection (conditions)

when the code happens in order of it being written

IF … THEN ELSE IF THEN ELSE END IF

• for … next • while … endwhile • repeat … until

if there are several possible options ot be tested