Programming in C: A Practical Approach, First Edition

1

Data Types, Variables and Constants

Learning Objectives

In this chapter, you will learn about:

• Various features of C language
• Various C’s standards
• C’s character set
• Identifiers and Keywords
• Rules to write identifier names in C
• Data types, type qualifiers and type modifiers
• Declaration statement
• Difference between declaration and definition
• Length and Range of various data types
• l-value and r-value concept
• Variables and constants
• Classification of constants
• Structure of a C program
• Process of compiling and executing a C program
• Writing simple C programs
• Using printf and scanf functions
• Use of sizeof operator

1.1 Introduction

C is a general-purpose, block-structured, procedural, case-sensitive, free-flow, portable and high-level programming ...