Not intialized...?? Variable z.

Question

public class Program
{
public static void main(String[] args) {

double p=1;
double S=0;
int x=6;
int n=5;
int m=2;
double z;
if(2*x>m){
for(int i=1;i<=n;i++)
p=p*(2*i+1);
z=x/2+3*p;
}

else if(2*x<=m){
for(int k=1;k<=n;k++)
if(k!=3 && k!=4)
S=S+(k+x);
z=x/3-2*S;
}
System.out.println("Prodhimi:"+p);
System.out.println("Shuma:"+S);
System.out.println("Rezultati:"+z);

}
}

Answer 1

double z = 0;

In your code, all statements that give value to z, are located in a nested block, which may or may not run. Therefore the compiler can't be sure if z is initialized, and you cannot print it if not initialized.
At the time of declaration, give it a starting value. If you are sure that the nested blocks will run whatever happens, then the initial value doesn't matter anyway.