Computer Applications
Write a program to input a number. Check and display whether it is a Niven number or not. (A number is said to be Niven which is divisible by the sum of its digits).
Example: Sample Input 126
Sum of its digits = 1 + 2 + 6 = 9 and 126 is divisible by 9.
Java
Java Iterative Stmts
ICSE 2016
349 Likes
Answer
import java.util.Scanner;
public class KboatNivenNumber
{
public void checkNiven() {
Scanner in = new Scanner(System.in);
System.out.print("Enter number: ");
int num = in.nextInt();
int orgNum = num;
int digitSum = 0;
while (num != 0) {
int digit = num % 10;
num /= 10;
digitSum += digit;
}
/*
* digitSum != 0 check prevents
* division by zero error for the
* case when users gives the number
* 0 as input
*/
if (digitSum != 0 && orgNum % digitSum == 0)
System.out.println(orgNum + " is a Niven number");
else
System.out.println(orgNum + " is not a Niven number");
}
}Variable Description Table
Program Explanation
Output
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Related Questions
You can multiply two numbers 'm' and 'n' by repeated addition method.
For example, 5 * 3 = 15 can be performed by adding 5 three times ⇒ 5 + 5 + 5 = 15Similarly, successive subtraction of two numbers produces 'Quotient' and 'Remainder' when a number 'a' is divided by 'b' (a>b).
For example, 5/2 ⇒ Quotient = 2 and Remainder = 1
Follow steps shown below:Process Result Counter 5 - 2 3 1 3 - 2 1 2 Sample Output: The last counter value represents 'Quotient' ⇒ 2
The last result value represents 'Remainder' ⇒ 1Write a program to accept two numbers. Perform multiplication and division of the numbers as per the process shown above by using switch case statement.
Using a switch statement, write a menu driven program to:
(a) generate and display the first 10 terms of the Fibonacci series
0, 1, 1, 2, 3, 5
The first two Fibonacci numbers are 0 and 1, and each subsequent number is the sum of the previous two.(b) find the sum of the digits of an integer that is input by the user.
Sample Input: 15390
Sample Output: Sum of the digits = 18
For an incorrect choice, an appropriate error message should be displayed.Using switch statement, write a menu driven program for the following:
(a) To find and display the sum of the series given below:
S = x1 - x2 + x3 - x4 + x5 - ………………….. - x20
(b) To find and display the sum of the series given below:
S = ………………….. to n terms
For an incorrect option, an appropriate error message should be displayed.
Write a menu driven program to perform the following tasks:
(a) Tribonacci numbers are a sequence of numbers similar to Fibonacci numbers, except that a number is formed by adding the three previous numbers. Write a program to display the first twenty Tribonacci numbers.
For example;
1, 1, 2, 4, 7, 13, ………………….(b) Write a program to display all Sunny numbers in the range from 1 to n.
[Hint: A number is said to be sunny number if square root of (n+1) is an integer.]
For example,
3, 8, 15, 24, 35,………………….are sunny numbers.For an incorrect option, an appropriate error message should be displayed.