Static Keyword in C

In C, static variables can only be initialized using constant literals. For example, following program fails in compilation. See this for more details.

#include<stdio.h> int initializer(void) {     return 50; }    int main() {     static int i = initializer();     printf(" value of i = %d", i);     getchar();     return 0; }

Output

 In function 'main':
9:5: error: initializer element is not constant
     static int i = initializer();
     ^