Book Image

Learn C Programming

By : Jeff Szuhay
Book Image

Learn C Programming

By: Jeff Szuhay

Overview of this book

C is a powerful general-purpose programming language that is excellent for beginners to learn. This book will introduce you to computer programming and software development using C. If you're an experienced developer, this book will help you to become familiar with the C programming language. This C programming book takes you through basic programming concepts and shows you how to implement them in C. Throughout the book, you'll create and run programs that make use of one or more C concepts, such as program structure with functions, data types, and conditional statements. You'll also see how to use looping and iteration, arrays, pointers, and strings. As you make progress, you'll cover code documentation, testing and validation methods, basic input/output, and how to write complete programs in C. By the end of the book, you'll have developed basic programming skills in C, that you can apply to other programming languages and will develop a solid foundation for you to advance as a programmer.
Table of Contents (33 chapters)
Section 1: C Fundamentals
Section 2: Complex Data Types
Section 3: Memory Manipulation
Section 4: Input and Output
Section 5: Building Blocks for Larger Programs

Naming variables

Every variable has an identifier or a name. A variable name is an identifier; function names are identifiers. We will encounter other kinds of identifiers that are used in many different contexts.

An identifier, or name, in C is a sequence of capital letters (A..Z) and small letters (a..z), digits (0..9), and the underscore (_) character. An identifier may not begin with a digit. Upper and lowercase letters are different from each other, so achar,aChar, AChar, andACHAR would identify different variables. An identifier may not have the same spelling as a C keyword. A list of C keywords can be found in the Appendix section of this book.

As with function identifiers, relying on the casing of letters to differentiate variables is not good programming practice. The most essential guideline is that variable names should closely match the kinds of values they hold. Name variables so that their names clearly reflect their purpose—for example, inch...