Sequence Damian Gordon. Pseudocode When we write programs, we assume that the computer executes the program starting at the beginning and working its.

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Presentation transcript:

Sequence Damian Gordon

Pseudocode When we write programs, we assume that the computer executes the program starting at the beginning and working its way to the end. This is a basic assumption of all algorithm design.

Pseudocode When we write programs, we assume that the computer executes the program starting at the beginning and working its way to the end. This is a basic assumption of all algorithm design. We call this SEQUENCE.

Pseudocode In Pseudo code it looks like this: Statement1; Statement2; Statement3; Statement4; Statement5; Statement6; Statement7; Statement8;

Pseudocode For example, for making a cup of tea: Organise everything together; Plug in kettle; Put teabag in cup; Put water into kettle; Wait for kettle to boil; Add water to cup; Remove teabag with spoon/fork; Add milk and/or sugar; Serve;

Pseudocode Or as a program: PROGRAM MakeACupOfTea: Organise everything together; Plug in kettle; Put teabag in cup; Put water into kettle; Wait for kettle to boil; Add water to cup; Remove teabag with spoon/fork; Add milk and/or sugar; Serve; END.

Pseudocode Or as a program: PROGRAM MakeACupOfTea: Organise everything together; Plug in kettle; Put teabag in cup; Put water into kettle; Wait for kettle to boil; Add water to cup; Remove teabag with spoon/fork; Add milk and/or sugar; Serve; END.

Organise everything together Plug in kettle Put teabag in cup Put water into kettle Turn on kettle Wait for kettle to boil Add boiling water to cup Remove teabag with spoon/fork Add milk and/or sugar Serve

Organise everything together Plug in kettle Put teabag in cup Put water into kettle Turn on kettle Wait for kettle to boil Add boiling water to cup Remove teabag with spoon/fork Add milk and/or sugar Serve START END

Pseudocode So let’s say we want to express the following algorithm: – Read in a number and print it out.

Pseudocode PROGRAM PrintNumber: Read number; Print out number; END.

Pseudocode So let’s say we want to express the following algorithm: – Read in a number and print it out double the number.

Pseudocode PROGRAM PrintDoubleNumber: Read number; Print 2 * number; END.

etc.