In the C language, the variable's **scope** refers to the part of the program where we reference it. The two types of variables in C are:

1. **Local variables**: These are defined within a function body. They are not accessible outside the function.

2. **Global variables**. They are defined outside the function body. Thus, they are accessible to the entire program.

# Program scope
Global variables declared outside the function bodies have a **` program scope`**. The availability of global variables stays for the entire program after its declaration. Moreover, global variables are initialized automatically by the compiler.

> A global variable declared with the static keyword has a File Scope. To find out more about this, [click here](https://www.educative.io/answers/what-is-file-scope-in-c).  

# Example
The following example shows two global variables, `a` and `b`. As seen in the code below, these variables are accessible by both the `test` function and the `main` function:

#include <stdio.h>

//Declare Global Variables
int a = 8;
float b = 7.5;

int test(){
  b = b + a;
  return b; 
}

int main(){
  //Access a
  printf ("The value of a is: %d\n", a);

  //Access b 
  printf ("The value of b is: %f\n", b);

  return 0;
}

What is Program Scope in C?

Variable scope in C defines where variables can be accessed. Local in functions; global for entire programs.