04 static variable in reciursion.c

#include <stdio.h>
//int x = 0; // this is globally accessed in all fxn 
int func(int n)
{
	 static int x=0; // this will take memory in main
	if (n > 0) // base condition of recursion 
	{
		x++; // everytime x is getting incremented 
		return func(n - 1) + x; // at returning time the addition of x will be performed // it will add last increatemented value everytinme
	}
	return 0;
}
int main()
{
	int a,b;
	scanf_s("%d",&a);
	printf("%d\n",func(a)); // fxn call
	b = func(a); // at 2nd time the value of x will be equal to the last incremented value if 5 is first time then this will be updated as 10 
	printf("%d", b);

	return 0;
}