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

Pseudocode

Pseudocode

Pseudocode

Pseudocode

wikiHow – How to write Pseudocode

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

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

Pseudocode Example

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

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