Buzz Number Java

by Online Tutorials Library July 22, 2022

Buzz Number Java

Buzz number is another special number in Java that ends with digit 7 or divisible by 7. Unlike Prime and Armstrong numbers, the Buzz number is not so popular and asked by the interviewers.

In simple words, a number is said to be Buzz if it ends with 7 or is divisible by 7.

Let’s take some examples of Buzz numbers.

42 is a Buzz number because it is divisible by 7.
107 is a Buzz number because it ends with 7.
147 is a Buzz number because it ends with 7 and also divisible by 7.
134 is not a Buzz number because it is neither end with 7 nor divisible by 7.

These are the following steps that we use to check whether the given number is a Buzz number or not.

We first take a number.
We then find the last digit of the number and check whether it is equals to 7 or not. If it equals 7, print “the number is a Buzz” number.
We then find the remainder of the number with 7. If the remainder equal to 0, print “the number is a Buzz number”.
Else print “number is not a buzz number”.

Let’s implement a program to check whether the user entered number is a Buzz number or not.

BuzzNumberExample.java

  //import required classes and packages  import Java.util.*;   import java.io.*;   import java.util.Scanner;    //create BuzzNumberExample class to check whether the given number is Buzz number or not  class BuzzNumberExample {           // create checkNumber() method that returns true when it founds number Buzz       static boolean checkNumber(int number)       {           // check whether the number ends with 7, is divisible by 7 or not          if(number % 10 == 7 || number % 7 == 0)  return true;//returns true when the number is Buzz  else  return false;//returns flase when the number is not Buzz      }           // main() method start      public static void main(String args[])       {  int n1, n2;    //create scanner class object to get input from user  Scanner sc=new Scanner(System.in);    //show custom message  System.out.println(“Enter first number”);    //store user entered value into variable n1  n1 = sc.nextInt();    //show custom message  System.out.println(“Enter second number”);    //store user entered value into variable n2  n2 = sc.nextInt();            if (checkNumber(n1))               System.out.println(n1 + ” is a Buzz number”);           else              System.out.println(n1 + ” is not a Buzz number”);           if (checkNumber(n2))               System.out.println(n2 + ” is a Buzz number”);           else              System.out.println(n2 + ” is not a Buzz number”);       }   }   

Output

Buzz Number Java

Let’s implement one more program to get all the Buzz number in a given range

FindAllBuzzNumbers.java

  //import required classes and packages  import java.util.*;   import java.io.*;   import java.util.Scanner;    //create FindAllBuzzNumber class to get all the Buzz number in a given range  class FindAllBuzzNumbers  {  //main() method start  public static void main(String args[])  {  int range;    //create scanner class object  Scanner sc=new Scanner(System.in);    //show custom message  System.out.println(“Enter the value of range”);    //store user entered value into variable range  range = sc.nextInt();    for(int i = 1; i <= range; i++)  checkNumber(i);  }     // create checkNumber() method to check Buzz number      static void checkNumber(int number)       {           // check whether the number ends with 7, is divisible by 7 or not          if(number % 10 == 7 || number % 7 == 0)  System.out.println(number + ” is an Buzz number”);      }    }  

Output

Buzz Number Java

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