Pseudocode Lesson 1

What is Pseudocode?

English-Type

Words and Phrases

Easy Conversion to
Programming Code

IPO Chart

Data INPUT

PROCESS Data

OUTPUT Results

What is Pseudocode?

Pseudocode, is not a programming language, but simply an informal way of describing a program. It does not require strict syntax, but instead serves as a general representation of a program's functions. Since each programming language uses a unique syntax structure, understanding the code of multiple languages can be difficult.

techterms.com/definition/pseudocode

Pseudocode

Multiple Choice

Is pseudocode a programming language?

• No

• Yes

Multiple Select

Pseudocode is useful for which of the following? Choose ALL that apply.

• to describe how an algorithm should work

• to explain a computing process to less-technical users

• to design code in a group setting

• to show the correct syntax for Phyton

Pseudocode

Pseudocode

Pseudocode

Pseudocode

wikiHow – How to write Pseudocode

Multiple Choice

Pseudocode is _________ and non-standard.

• subjective

• complex

• language-specific

• cryptic

Multiple Choice

When working on a project with others, try to use standard structures that are not specific syntax of a particular programming language.

• True

• False

Pseudocode Loops

​For loop – Commonly known as the repeat (x) { ... } loop.

Do while loop – Known as the repeat { ... } until (!CONDITION) loop.

Infinite loop – Known as the repeat forever { ... } loop.

For i = 1 To 5

OUTPUT i // would output each number 1 To 5

EndFor

Pseudocode Loops

​For loop – Commonly known as the repeat (x) { ... } loop.

Do while loop – Known as the repeat { ... } until (!CONDITION) loop.

Infinite loop – Known as the repeat forever { ... } loop.

games ← ['Fortnite', 'Call of Duty', 'Battlefield']

For i = 0 To 2

While games[i] != 'Battlefield'

i = i + 1

Endwhile

Endfor

Multiple Choice

The pseudocode represents a nested loop. Based on your observation, what best describes a nested loop?

• A nested loop is a loop inside the body of the outer loop.

• A nested loop is a loop alongside the body of the outer loop.

• A nested loop is two loops running together.

• A nested loop is a loop where one loop waits for the other is done before running.

Multiple Choice

If you wanted to display the name of the game found in each position of the array games[i], which line would you use.

• OUTPUT games[i]

• INPUT games[i]

• OUTPUT games

• INPUT games[i] on the screen

Multiple Choice

If you wanted to display the name of the game found in each position of the array games[i] ONLY once, where would you place the code?

• Immediately after For i = 0 to 2

• Immediately after 'For'

• Immediately after i = i + 1

• Before For i = 0 to 2

Multiple Choice

What would be displayed if i = 1 when OUTPUT games[i] is placed after i = i + 1?

• 'Call of Duty' will be displayed

• 'Fortnite' will be displayed

• 'Battlefield' will be displayed

• Nothing because games[i] would be 'Battlefield' and the WHILE loop will be skipped.

Multiple Choice

If you wanted to add 'Forza' to the list, how would you edit the code?

• Change 2 to 4 because there are now 4 items in the array

• ADD 'Forza' to any position before 'Battlefield' in the array and change

  For i = 0 to 2

  to For i = 0 to 3

• ADD 'Forza' to any position in array ONLY

• You cannot add a new item because the array is limited to 3 items

Pseudocode Loops

​For loop – Commonly known as the repeat (x) { ... } loop.

Do while loop – Known as the repeat { ... } until (!CONDITION) loop.

Infinite loop – Known as the repeat forever { ... } loop.

Do

OUTPUT(fileVariable.readLine) // reads each line of the file until the file ends

Until fileVariable.endOfFile

Pseudocode Loops

Discussion questions

Multiple Choice

What is the value of Met if Num = 4, in 9.3.3? Show work.

• Blu = (2*4)+4

  Blu = 8+4 = 12

  Met = 12+4-5

  Met = 16-5 = 11

• Blu = 2*(4+4)

  Blu = 2*8 = 16

  Met = 16+4-5

  Met = 20-5 = 15

• Blu = 2*4+4

  Blu = 8+4 = 12

  Met = 12+4-5

  Met = 21

• Blu = (2*4)+4

  Blu = 8+4 = 12

  Met = 12+4-5

  Met = 16-5 = 10

Multiple Choice

How many times will 'OK' be displayed after the user inputs 'page', in 9.3.3 right?

• 0

• 1

• 2

• 4

Multiple Choice

How many times will 'Oh No' be displayed after the user inputs 'page', in 9.3.3 right?

• 0

• 1

• 2

• 4

Multiple Choice

When will 'Oh No' get displayed in 9.3.3 right?

• If word is not equal to 'page'

• The first time through the loop

• Never

• When word = 'page'

Pseudocode Example

• Input three numbers
• Add them together
• Show the results

Multiple Choice

Which option would display the average of the numbers?

• Add (number1 + number2 + number3)/3

• OUTPUT result (number1 + number2 + number3)/3

• OUTPUT result (number1 + number2 + number3)*.3

• Add/3

Pseudocode Example

• Input three numbers
• Add them together
• Show the results

Same Data Type

Pseudocode Example

• Input three numbers
• Add them together
• Show the results

Same Data Type and Output to Variable

Pseudocode Sequential
Statements

Executed one after the other
from the first to the last

Example 6:

Pseudocode Conditional
Branching

IF-THEN-ENDIF
IF-THEN-ELSE

Pseudocode Conditional
Branching

Pseudocode Conditional
Branching – Example 8

Pseudocode Conditional
Branching – Example 8

Pseudocode Conditional
Branching – Example 9

Pseudocode Conditional
Branching – Example 9

Pseudocode Conditional
Branching – Example 10
IF-THEN-ELSE

Pseudocode Conditional
Branching – Example 10
IF-THEN-ELSE

Pseudocode Conditional
Branching – Example 11

IF-THEN-ELSE

Pseudocode Conditional
Branching - IF-THEN-ELSE

Pseudocode Nested
Conditions

IF-THEN ELSE IF-THEN

Pseudocode Loops

Pseudocode Loops

Pseudocode Loops

Pseudocode Loops