Why is it showing me error while assigning nextIn()

Question

public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
System.out.println("Please enter a number");
int number =s.nextInt();
int sum =0;

while (number!= -1) {
sum +=number;
System.out.println("Please give a number");
number=s.nextInt();}

System.out.println("Sum of output is : " +sum);

}

}

Answer 1

You use "s.nextInt" but the scanner is declared as "scan" then you would use "scan.nextInt"