22 Jan C – Variable Scope

The existence of a variable in a region is called its scope, or the accessibility of a variable defines its scope. The scope of variables is of utmost importance when accessing variables. We will discuss global and local variables below.

Before moving further, we’ve prepared a video tutorial to understand the scope of variables in C:

Local Variables

Whenever a variable is defined in a function or a block, it can be used only in that function or block. The value of that variable cannot be accessed from outside the function. Let us see an example wherein we will create and initialize local variables. We will also see how to access and use local variables:

Output

Global Variables

A variable has Global Scope if it is defined outside a function, i.e., the code body, and is accessible from anywhere. Let us see an example wherein we will learn how to create and work with global variables:

Output

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Read More:

• C – Tokens
• C – Variables
• C – Constants
• C – Operators
• C – Decision-Making Statements
• C – Loops
• C – Arrays
• C – Strings