The document discusses the implementation stage in software development, highlighting the importance of selecting an appropriate software development environment before coding begins. It categorizes programming languages into three types: procedural, declarative, and event-driven, with examples for each. The document also briefly explains the characteristics of each type, including how procedural languages specify operation sequences, event-driven languages trigger code through user interactions, and declarative languages focus on factual declarations for problem-solving.

1. Implementation – Types of programming languages

2. Implementation After the design is complete, the next stage in the software development process is implementation Before any coding can begin, it is important to decide on an appropriate software development environment

3. Implementation Different software development environments have been designed for different purposes e.g. Algol for Science Task – as a class research different environments and add them to Etherpad

4. Implementation There are 3 types of programming language. Procedural Declarative Event-driven

5. Implementation Procedural Languages In a procedural language, the programmer specifies the sequence of operations to be performed. A procedural program has a clear start point, and end point Pascal, BASIC and C++ are examples of procedural programming languages

6. Implementation BASIC listing

7. Implementation Event-driven Event-driven environments allow the user to design the HCI with buttons, text, fields etc. Blocks of program code are triggered by events e.g. button press, key press etc. RealBasic and Visual Basic are examples of Event driven environments

8. Implementation Visual Basic Interface

9. Implementation Declarative Languages The programmer declares all of the facts and relationships at the outset Queries can then be performed on the facts and relationships in order to solve problems Examples are PROLOG and LISP. Declarative languages are often used in artificial intelligence

10. Implementation Sample PROLOG listing