Static Keyword

“Static” keyword has two meanings, depending onwhere the static variable is declared :

• Outside a function, static variables/functions only visible within that file, not globally (cannot be extern’ed) .

• Inside a function, static variables: 

1. Still local to that function.
2.   Initialized only during program initialisation.
3.  Do not get reinitialized with each function call .

Example 1 : 

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#include <stdio.h> void counter() { static count=0; count++; printf("%d\n",count); } int main() { for(int i=0;i<5;i++) { counter(); } return 0 ; }

   

Output: 

1
2
3
4
5

Example 2 : 

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#include <stdio.h> void counter() { int count=0; count++; printf("%d\n",count); } int main() { for(int i=0;i<5;i++) { counter(); } return 0 ; }

Output : 

1
1
1
1
1

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