1729 = 1^3 + 12^3 = 9^3 + 10^3 Go to the editorIn recreational mathematics, a harshad number in a given number base, is an integer that is divisible by the sum of its digits when written in that base. Let’s sum the digits again. Input another number from the user and find out how many numbers are equal to the number passed, how many are greater and how many are less than the number passed. Its proper divisors are 1, 2, and 3, and 1 + 2 + 3 = 6. Write a Program in Java to check whether a number is a Keith Number or not. 0, 1, 2, 5, 12, 29, 70, 169, 408, 985, 2378, 5741, 13860,…. 1.6 Write a program to count number of words in a String? The course is designed to give you a head start into Java programming and train you for both core and advanced Java concepts along with various Java frameworks like Hibernate & Spring. Go to the editor A Lychrel number is a natural number that cannot form a palindrome through the iterative process of repeatedly reversing its digits and adding the resulting numbers. A Disarium number is a number defined by the following process : First, we find the remainder of the given number by using the modulo (%) operator. An Automorphic number is a number whose square ends with the same digits as the original number.E.g – 25, 76, 376 etc.. Steps to Check Automorphic Number in Java. In number system a palindromic number is a number that is the same when written forwards or backwards, i.e., of the form . © Copyright 2011-2018 www.javatpoint.com. To convert an integer to binary divide the number by 2 until it becomes 0. Expected Output, 29.Write a Program in Java to check whether a number is a Lucky Number or not. The java program to calculate average of three numbers has been written in five different ways such as Scanner class, direct value initialization, Buffered Reader class, Command Line argument, methods, and using Constructor. 142857 × 2 = 285714 Example: 19 is a happy number Test Data Write a Java program to check whether a given number is a Disarium number or unhappy number. There are mainly six sub-classes under Number class.These sub-classes define some useful methods which are used frequently while dealing with numbers. Turns left: 8 65 Your Guess Is Higher Than THe Right Guess! Multiply the variable reverse by 10 and add the remainder into it. The algorithm would be same as that of the one used in above example. There are three ways to reverse a number … 13. Sample Input: 135. 14, 19, 28, 47, 61, 75, 197, 742, 1104, 1537, 2208, 2580, 3684, 4788, 7385, 7647, 7909, 31331, 34285, 34348, 55604, 62662, 86935, 93993, 120284, 129106, 147640, 156146, 174680, 183186, 298320, 355419, 694280, 925993, 27. Some other DISARIUM are 89, 175, 518 etc. A pronic number is a number which is the product of two consecutive integers, that is, a number of the form n(n + 1). 13832 = 2^3 + 24^3 = 18^3 + 20^3 Java String class, Java Number class are all examples of these wrapper classes which convert a primitive datatype to an object of the class. Input a number : 110 65728 = 12^3 + 40^3 = 31^3 + 33^3 39312 = 2^3 + 34^3 = 15^3 + 33^3 Expected Output. Go to the editor 1. Input a number: 8 Scala Programming Exercises, Practice, Solution. For example 3210, 7056, 8430709 are all duck numbers whereas 08237, 04309 are not. Write a Java program to check whether a number is a Harshad Number or not. Java programs: Basic Java programs with examples & outputs. 40 Pattern Programs in Java – Number, Star, Alphabet Patterns June 9, 2020 by javainterviewpoint Leave a Comment In this article, we will learn to print the different Pattern Programs in Java, it is the most famous interview question as it tests … The first four Mersenne primes are 3, 7, 31, and 127, 23. Go to the editorNote: A Duck number is a number which has zeroes present in it, but there should be no zero present in the beginning of the number. 14. Expected Output : 46683 = 3^3 + 36^3 = 27^3 + 30^3 Expected Output, 20. Happy number: Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1, or it loops endlessly in a cycle which does not include 1. Turns left: 9 75 Your Guess Is Higher Than THe Right Guess! Our logic to print the numbers would require two for-loops to achieve this. 50 Yor Guess is lower than the right guess! For example 175 is a Disarium number : Go to the editor //http://introcs.cs.princeton.edu/java/13flow/Ramanujan.java.html Go to the editor Expected Output. In arithmetic and algebra, the cube of a number n is its third power: the result of the number multiplied by itself twice: Write a Java program to find and print the first 10 happy numbers. Actually, the binary number consists of only 0 and 1. Mail us on hr@javatpoint.com, to get more information about given services. ; Compare the last (c) digits of (sqr) with the (num). Java Program to Add two Numbers By Chaitanya Singh | Filed Under: Java Examples Here we will see two programs to add two numbers, In the first program we specify the value of both the numbers in the program … Go to the editor Write a Java program to check if a given number is circular prime or not. In combinatorial mathematics, the Catalan numbers form a sequence of natural numbers that occur in various counting problems, often involving recursively-defined objects. java.util.Random is a package that comes with Java, and we can use it to generate a random number between a range. Note: All even integer numbers greater than 4 are Goldbach numbers. 2. The first few Fermat numbers are: 26. The computer will respond as "Correct Guess" if guess is correct otherwise respond as "not correct". 5! * 100000 Write a Java program to check if a number is palindrome or not. Perfect number: In number system, a perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is, the sum of its positive divisors excluding the number itself. Write a Java program to generate and show all Kaprekar numbers less than 1000. Expected Output, 18. An unhappy number is a number that is not happy. Java Program Answer: An instance of Random class is used to generate a stream of pseudorandom numbers. [crayon-6004c9d71379f746741040/] In … Go to the editor Accept values from the user in that array. 12 + 92=82 Test Date:Input an integer number: 235 The first perfect number is 6. Write a program to accept an even integer ‘N’ where N > 9 and N < 50. 4104 = 2^3 + 16^3 = 9^3 + 15^3 Expected Output : 7. The following program is slightly different from the above program because we have defined a method that contains the logic to check even number. Example : Go to the editorCircular Prime : A circular prime is a prime number with the property that the number generated at each intermediate step when cyclically permuting its (base 10) digits will be prime. * 10000 Calculate the square root of number and taking floor of the number by typecasting it to; Find the product of the squareRoot and (squareRoot + 1), and then compare the product with the number. In each step take the modulo by 2 and store the remainder into an array or stack. All rights reserved. Deficient number: In number theory, a deficient number is a number n for which the sum of divisors σ(n)<2n, or, equivalently, the sum of proper divisors (or aliquot sum) s(n)

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