In programming, a scope is a section of the programme where a defined variable can exist but cannot be accessible beyond that variable. In the C programming language, variables can be declared in three places: inside a function or a block (local variables), outside a function or a block (global variables), and outside a function or a block (global variables).
In simple terms, a variable's scope is its duration in the programme. This means that a variable's scope is the entire program's block of code where the variable is declared, used, and updated.
Variables in C have a similar idea. The accessibility of a variable in a programme or function is referred to as variable scope. A variable, for example, may be accessed only within a single function (your apartment key) or throughout the entire C programme (the shared access key).
C has four kinds of scopes: block scope. file scope. function scope.
The scope of a variable refers to the area of the programme where it can be used. A variable's or function's lifespan is the time between when memory is allocated to store it and when it is freed.