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Software Design and Development
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Week 5

Learning Preparation

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What are the different types of programming?

Languages

Java

Web applications
Mobile
Embedded Systems
info

this video old asl 😭

C

Embedded systems
Hardware drivers
Local applications

Python

Web applications
Artificial Intelligence

SQL

DB Queries
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What are metalanguages?

What is a metalanguage?

Metalanguages provide an understanding of rules in programming languages.
They represent a syntax which is used as a checklist when compiling a program to remove errors before execution.
EBNF Symbols
Symbol
Meaning
=
Is defined as
|
Indicates choice between elements
<>
Non-terminal symbol
{}
Encloses elements to be repeated
[]
Encloses optional elements
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EBNF Sample

variable = <letter> {<letter> | <digit>}
output statement = DISPLAY (<variable> | <string> | <number>)
Railroad Symbols
Symbol
Meaning
CleanShot 2024-02-28 at 13.30.03@2x.png
Predefined element
CleanShot 2024-02-28 at 13.30.13@2x.png
Fixed element
CleanShot 2024-02-28 at 13.30.18@2x.png
Path lines
There are no rows in this table
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Railroad Sample

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CleanShot 2024-02-28 at 13.31.08@2x.png
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