Variable Scope

Global Variables : 

As you notice in the next example x defined one time globally then used in function() and main(). 

Example : 

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#include <stdio.h> #include <stdlib.h> int x=0; int function (){ x++; return x; } int main() { function () ; printf("X=%d",x); return 0; }

Ouptut : 

Local Variables : 

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