1. 1
Algorithm and Designs
Structured English
Flow charts
Pseudo code

2. 2
Structured English
 This is a method of showing the
logical steps in an algorithm, using
an agreed subset of straightforward
English words.

3. 3
Flowcharts
 A way of making an algorithm
using a set of symbols linked
together with flow lines, the steps
required for a task and the order
in which they are to be performed.

4. 4
Pseudo code
 This is a method of showing
detailed logical steps in an
algorith, using
keywords, identifiers with
meaningful names and
mathematical operators to
represent a solution.

5. 5
Writing simple algorithms using pseudo code
▲Note: Each line of pseudo code is usually a single step in an algorithm.

6. 6
Writing simple algorithms using pseudo code
 Input and Output

7. 7
Writing simple algorithms using pseudo code
 Operators used in pseudo code assignment statements:

8. 8
Writing simple algorithms using pseudo code
 If and Case statements

9. 9
Writing simple algorithms using pseudo code
 If and Case statements

10. 10
Writing simple algorithms using pseudo code
 Relational operators used in pseudo code selection statements:

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Writing simple algorithms using pseudo code
 To perform iteration using FOR, REPEAT–UNTIL and WHILE loops:
▲Note: A FOR loop has a fixed number of repeats, the STEP increment is an optional
expression that must be a whole number.

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Writing simple algorithms using pseudo code
 Repeat statement:
▲Note: Statements in a REPEAT loop are always executed at least once.

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Writing simple algorithms using pseudo code
 While loop:
▲Note: Statements in a WHILE loop may sometimes not be executed.

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Writing simple algorithms using pseudo code
 Example: An algorithm to find the average of a number of integers input

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Writing simple algorithms using pseudo code
 Identifier table for the algorithm: