What is Program Scope in C?
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:
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Local variables: These are defined within a function body. They are not accessible outside the function.
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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.
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 Variablesint a = 8;float b = 7.5;int test(){b = b + a;return b;}int main(){//Access aprintf ("The value of a is: %d\n", a);//Access bprintf ("The value of b is: %f\n", b);return 0;}
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