why is the output not similar if I type "int num_calls = 1;" instead of "static int num_calls=1;" ?

Question

#include <stdio.h>

void say_hello();

int main() {
int i;

for (i = 0; i < 5; i++) {
say_hello();
}

return 0;
}

void say_hello() {
static int num_calls = 1;

printf("Hello number %d\n", num_calls);
num_calls++;

}

Answer 1

Because it is static variable when you use static infront of it .