Java Reference
In-Depth Information
//Program: Divisibility test by 3 and 9
import
java.util.*;
public class
DivisibilityTest
{
static
Scanner console =
new
Scanner(System.in);
public static void
main (String[] args)
{
int
num;
int
temp;
int
sum;
System.out.print("Enter a positive integer: ");
num = console.nextInt();
System.out.println();
temp = num;
sum = 0;
do
{
sum = sum + num % 10;
//extract the last digit
//and add it to sum
num = num / 10;
//remove the last digit
}
while
(num > 0);
System.out.println("The sum of the digits = " + sum);
if
(sum % 3 == 0)
System.out.println(temp + " is divisible by 3");
else
System.out.println(temp + " is not divisible by 3");
if
(sum % 9 == 0)
System.out.println(temp + " is divisible by 9");
else
System.out.println(temp + " is not divisible by 9");
}
}
Sample Runs: (In these sample runs, the user input is shaded.)
Sample Run 1:
Enter a positive integer: 27193257
The sum of the digits = 36
27193257 is divisible by 3
27193257 is divisible by 9
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