- Java Basic Programs
- Java Programming Examples
- Java Print Hello World
- Java Get Input from User
- Java Print Integer
- Java Add two Numbers
- Java Check Even or Odd
- Java Check Prime or Not
- Java Check Alphabet or Not
- Java Check Vowel or Not
- Check Reverse equal Original
- Java Fahrenheit to Celsius
- Java Celsius to Fahrenheit
- Java Perfect Number Program
- Java Find Quotient Remainder
- Java Days to Seconds
- Java Count Digits in Number
- Java Binary Number Addition
- Java Discount Program
- Java Compute Courier Charge
- Java Find Telephone Bill
- Java Print ASCII Values
- Java Check Palindrome or Not
- Java Check Armstrong or Not
- Generate Armstrong Numbers
- Add two Numbers using Pointers
- Java Mathematical Programs
- Add Subtract Multiply & Divide
- Java Make Calculator
- Java Add Digits of Number
- Java Check Leap Year or Not
- Java Check Divisibility
- Java Find Simple Interest
- Java Find Compound Interest
- Java Print Fibonacci Series
- Java Find nCr nPr
- Calculate Average & Percentage
- Java Calculate Arithmetic Mean
- Java Calculate Student Grade
- Java Print Table of Number
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- Java Add n Numbers
- Java Interchange two Numbers
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- Count Positive Negative & Zero
- Find Largest of two Numbers
- Find Largest of three Numbers
- Java Find Factorial of Number
- Java Find HCF & LCM
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- Java Decimal to Binary
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- Java Pattern Programs
- Java Pattern of Stars
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- Java Array Programs
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- Java Count Even/Odd Number
- Two Dimensional Array Program
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- Three Dimension Array Program
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- Delete Vowels from String
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- Java Find Occurrence of a Word
- Occurrence of Each Character
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- Java Count Repeated Characters
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- Generate Random Numbers
- Java Print Time & Date
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- Java Programming Tutorial
- Java Tutorial

# Java Program to Check if a Number is Divisible by Another Number

This article covers a program in Java to check if a number entered by user at run-time, is divisible by 3, 5, 7, 11 etc. or not. I've created multiple programs on the same topic. Let's start with very simple one.

## Check if a Number is Divisible by 3

The question is, *write a Java program to check whether a number is divisible by 3 or not. The number must be received
at run-time of the program.* Here is its answer. I mean, the program given below is the answer to this question:

import java.util.Scanner; public class CodesCracker { public static void main(String[] args) { int num, den=3; Scanner s = new Scanner(System.in); System.out.print("Enter a Number: "); num = s.nextInt(); if(num%den==0) System.out.println("\nIt is divisible by 3."); else System.out.println("\nIt is not divisible by 3."); } }

Here is its sample run with user input **12** as number to check whether it is divisible by 3 or not:

Here is another sample run with user input **13**:

## Check if a Number is Divisible by 5

To create a program that can check whether a number entered by user is divisible by 5 or not, just replace 3 with 5 from above program. Rest of all the codes are same.

## Check if a Number is Divisible by Another Number

This is the main program that we need. Because using this program, we can test divisibility with any combination of numbers. For example, we can check whether a number is divisible by 11 or not, whether a number is divisible by 7 or not and so on.

import java.util.Scanner; public class CodesCracker { public static void main(String[] args) { int num, den; Scanner s = new Scanner(System.in); System.out.print("Enter Numerator: "); num = s.nextInt(); System.out.print("Enter Denominator: "); den = s.nextInt(); if(num%den==0) System.out.println("\n" +num+" is divisible by " +den); else System.out.println("\n" +num+" is not divisible by " +den); } }

Here is its sample run with user input **21** as numerator and **7** as denominator to check whether the number 21 is
divisible by 7 or not:

Here is another sample run with user input **41** as numerator and **4** as denominator to check whether the number
**41** is divisible by 4 or not:

Now let's modify the above program to provide user, two options to go with. One to check if a number is divisible by another single number, and other to check whether a number is divisible by multiple numbers or not:

import java.util.Scanner; public class CodesCracker { public static void main(String[] args) { int num, choice; Scanner s = new Scanner(System.in); System.out.println("1. Divisibility Test with Single Number."); System.out.println("2. Divisibility Test with Multiple Numbers."); System.out.print("Enter Your Choice (1 or 2): "); choice = s.nextInt(); if(choice==1) { int den; System.out.print("\nEnter Numerator: "); num = s.nextInt(); System.out.print("Enter Denominator: "); den = s.nextInt(); if(num%den==0) System.out.println("\n" +num+" is divisible by " +den); else System.out.println("\n" +num+" is not divisible by " +den); } else if(choice==2) { int total, count=0; System.out.println("\nWith How many numbers to apply divisibility test ? "); total = s.nextInt(); int[] den = new int[total]; System.out.print("\nEnter Numerator: "); num = s.nextInt(); System.out.print("Enter " +total+ " Denominators: "); for(int i=0; i<den.length; i++) { den[i] = s.nextInt(); if(num%den[i]!=0) count=1; } if(count==0) System.out.println("\n" +num+" is divisible by all given numbers"); else System.out.println("\n" +num+" is not divisible by all given numbers"); } else System.out.println("\nInvalid Choice!"); } }

Here is its sample run with user input **2** as choice, **2** as total numbers, **30** as numerator, **3** and
**5** as two numbers to check whether 30 is divisible by 3 and 5 or not:

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