Basic Computer Science Introduction.pptx
- 1. 1 Basic Introduction on Computer Science
- 2. 2 FIGURE 1-1 A Computer System
- 3. 3 FIGURE 1-2 Basic Hardware Components
- 4. 4 Operating System An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Windows Linux Android iOS Mac…and the list goes on Few Example OS:
- 5. 5 FIGURE 1-3 Relationship between system and application software
- 6. 6 Computer Languages To write a program for a computer, we must use a computer language. Over the years computer languages have evolved from machine language to natural languages. Machine Languages Symbolic Languages High-Level Languages Topics discussed in this section:
- 7. 7 FIGURE 1-9 Computer Language Evolution
- 8. # 8 PROGRAM 1-1 The Multiplication Program in Machine Language
- 9. 9 The only language understood by computer hardware is machine language. Note
- 10. 10 PROGRAM 1-2 The Multiplication Program in Symbolic Language
- 11. 11 PROGRAM 1-3 The Multiplication Program in C#
- 12. 12 Compiler A compiler is primarily used for programs that translate source code from a high-level programming language to a lower level language (e.g. assembly language, object code, or machine code) to create an executable program
- 13. 13 Interpreter An interpreter is a computer program that directly executes instructions written in a programming or scripting language, without requiring them previously to have been compiled into a machine language program
- 15. 15 IDE An integrated development environment (IDE) is a software application that provides comprehensive facilities to computer programmers for software development. An IDE normally consists of at least a source code editor, build automation tools and a debugger. • Editing Source Code • Syntax Highlighting • Building Executables • Debugging • Local build automation
- 16. 16 Microsoft Visual Studio Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft. It is used to develop • computer programs • websites • web apps • web services • mobile apps.
- 17. 17 OOPS Object-oriented programming aims to implement real-world entities like • Abstraction • Encapsulation • Inheritance • Polymorphism. The main aim of OOP is to bind together the data and the functions that operate on them so that no other part of the code can access this data except that function.
- 18. 18 C# Introduction Features Of C# C-sharp is an object-oriented programming language that offers tons of features to programmers. Some of which are: •Simple and easy to understand syntax. •It offers Interoperability, scalability and is updatable. •It is based on components. •It has a rich library and is a structured language. •It is type-safe i.e. it only allows code to access the memory location for which it has authorized access.
- 19. 19 STRUCTURE OF C# PROGRAM
- 20. 20 Data types in C# Features Of C# A data type specifies the size and type of variable values. It is important to use the correct data type for the corresponding variable; to avoid errors, to save time and memory, but it will also make your code more maintainable and readable. The most common data types are: