Variables - named space  in a computers memory that stores a value. i.e. first_name = "ted"

Pseudo Code

https://www.slideshare.net/DamianGordon1/pseudocode-10373156 

https://www.slideshare.net/nicky_walters/pseudocode-flowcharts  (there are also other useful programming presentations on this user's Slideshare page)

A method of writing up a set of instructions for a computer program using plain English. This is a good way of planning a program before coding. 

Basic Controls

• INPUT – indicates a user will be inputting something

• OUTPUT – indicates that an output will appear on the screen

• WHILE – a loop (iteration that has a condition at the beginning)

• FOR – a counting loop (iteration)

• REPEAT – UNTIL – a loop (iteration) that has a condition at the end

• IF – THEN – ELSE – a decision (selection) in which a choice is made

  • any instructions that occur inside a selection or iteration are usually indented

• GET - retrieve the value from a variable

• SET - assignment is the physical act of placing a value inside a variable

Using pseudocode

Pseudocode can be used to plan out programs. Planning a program that asks people what the best subject they take is, would look like this in pseudocode:

REPEAT

  OUTPUT 'What is the best subject you take?'

  INPUT user inputs the best subject they take

  SET answer to the user's input

  IF answer = 'Computer Science' THEN

    OUTPUT 'Of course it is!'

  ELSE

    OUTPUT 'Try again!'

UNTIL answer = 'Computer Science'

SOURCE: https://www.bbc.co.uk/education/guides/z3bq7ty/revision/2

START

FOR i = 0, i<=10, i++

  OUTPUT "i x 5 = " + i * 5

END

Example for a Game

1.   Var lives = 3

2.   Var enemy_Array

3.        

4.   BEGIN GameLoop

5.    MovePlayer()

6.    CheckCollision()

7.   END 

8.        

9.   BEGIN MovePlayer

10.     IF Right Arrow Pressed and player.x<stage.width

11.         Player.x +=10

12.     ELSE IF Left Arrow Pressed and player.x>0

13.        Player.x -=10

14.     END IF

15.   END

16.    

17.   BEGIN CheckCollisions

18.     FOR counter = 1 to enemy_Array:

19.       IF enemy_array[counter] touching player

20.          Lives -=1

21.          IF lives <1

22.              End Game

23.         ENDIF

24.       ENDIF

25.     END FOR

26.   END

1. Calculate the perimeter of a rectangle

2. Calculate the area of a triangle. The user will enter the height and width

3. Allow the user to enter their first name, last name and year of birth and calculate their age

4. Write pseudo code that performs the following: Ask a user to enter a number. If the number is between 0 and 10, write the word blue. If the number is between 10 and 20, write the word red. if the number is between 20 and 30, write the word green. If it is any other number, write that it is not a correct color option. 

5. Write pseudo code that will perform the following. 

   a) Read in 5 separate numbers. 

   b) Calculate the average of the five numbers. 

   c) Find the smallest (minimum) and largest (maximum) of the five entered numbers 

Input / Processing / Output

Input / Processing / Output tables can be used before writing structured pseudocode. IPO tables are a useful planning tool when determining what inputs you will need (helping to identify potential required variables), what processes and calculations will be undertaken, and what outputs your programs will generate. Completing an IPO table before writing pseudocode may assist the process of writing complete pseudocode and then creating a program.