Scope of Variable

Introduction

The scope of a variable defines which part of the program that particular variable is accessible in. In C++, the variable can be either of these two:

• Local variable
• Global variable

Local variable

Suppose you are staying at a hotel. The hotel manager gives you a key to room No. 5. You can only access room No. 5 in the hotel.

The local variable is just like a hotel room-specific key. It is only accessible within the block in which it is declared.

📝 Block is a section of code enclosed inside the curly braces.

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The local variable can only be accessed within the block in which it is declared.

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A block can be a function, loop, or conditional statement. These variables are created when the compiler executes that particular block and destroyed when the compiler exits that block.

Illustration

See the illustration given below!