Testing Divisibility

[stupidenator]

Hey Everyone,

I just have a quick question... does anyone know how to test 2 integers (int a, int b) to see if int a is evenly divisible by int b? I tried it like this but it doesn't really seem to work:

public boolean isDivisible(int a, int b)
	{	
		double d = a / b;
	
		if (d == Math.round(d))
			return true;
		else
			return false;
	}

Anyone have any ideas? Thanks in advance.

-Nick Nisi

[tonakai]

you can use "%"
if ((a % b) == 0 ) return true;

[stupidenator]

you can use "%"
if ((a % b) == 0 ) return true;

Thanks Tonakai!

- Nick Nisi

[polasikat]

import java.io.*;
public class Divisibility{
	
	
	public static void main(String[] args) throws IOException{
		
	String answer;
 	do
		
	{
		
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
		
	
	
			System.out.println("Enter start number:");
			int i = Integer.parseInt(input.readLine());			
			System.out.println("Enter end number:");
			int j = Integer.parseInt(input.readLine());
		
			for (i= i; i<=j; i++){
				System.out.println();
				System.out.print(i+ " is divisible by ");
				int d=1;
				while (d<=j){
				if (i%d == 0)
				System.out.print(d+ " ");
				
				d++;
				}
			}
	System.out.println("\nEnter another number or 'no' to exit the program:");
  	answer = input.readLine();
  }
  while (!answer.equals ("no"));	
	
		}
	}

[polasikat]

Create a program that displays the numbers that divide evenly into all the numbers from a given starting and ending number by the user. Class name is Divisibility

Sample output

Starting number:1
Ending number: 1

1 is divisible by 1
2 is divisible by 1 2
3 is divisible by 1 3
.
.
.
.
.
77 is divisible by 1 7 11
78 is divisible by 1 2 3 6 13 26 39
.
.
.
.
100 is divisible by 1 2 4 5 10 20 25 50

Enter another number or 'no' to exit the program: no

[zeroliken]

Create a program that displays the numbers that divide evenly into all the numbers from a given starting and ending number by the user. Class name is Divisibility

Sample output

Starting number:1
Ending number: 1

1 is divisible by 1
2 is divisible by 1 2
3 is divisible by 1 3
.
.
.
.
.
77 is divisible by 1 7 11
78 is divisible by 1 2 3 6 13 26 39
.
.
.
.
100 is divisible by 1 2 4 5 10 20 25 50

Enter another number or 'no' to exit the program: no

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