i didn't understand why " if(number%i ==0) " ->(condition is always true) ... which means this method will always return false

[condition is always true , which means that the method will always return false ][1]

  public class Primenumber {
    public int number ;
    public void saisie(){
        Scanner sc = new Scanner(System.in);
        System.out.print("donnez un un entier : ");
        number = sc.nextInt();
    }
    public boolean isprime(){
        for(int i=1 ; i <= number-1 ; i++ )
            if(number%i ==0)
                return false;
        return true ;
    }
} ```