C Programming

10

Storage Class

CHAPTER OUTLINE

10.1 Introduction

10.2 Automatic Variables

10.3 External Variables

10.4 Static Variables

10.5 Register Variables

10.1 INTRODUCTION

The variables declared in C programs are different from the ones in other languages. We can use the same variable names in the C program in separate blocks. When we declare a variable, it is available only to the specific part or block of the program. The remaining block or other function cannot access the variable. Variables declared within the function are called as internal variables and those declared outside the function are called as external or global variables.

The area or block of the C program from where the variable can be accessed is known as the ‘scope of the variables’. ...