JAVA PROGRAM ! Is the following program correct? If it is correct, what is the output? If it is incorrect, please correct the code and write down the output of the program.

public static void main(String[] args){

System.out.println(frac(5));

}

public static void frac(int n){

int i=0;

int sum=0;

while (i<=n){

sum=sum*i;

}

}