So we will have (rows-i)*2 whitespaces before we print any number. Go to the editor Equivalently, a perfect number is a number that is half the sum of all of its positive divisors (including itself) i.e. Go to the editor Expected Output : For example 3210, 7056, 8430709 are all duck numbers whereas 08237, 04309 are not. Expected Output, 21. Factorial Program in Java. The first Catalan numbers for n = 0, 1, 2, 3, … are 1, 1, 2, 5, 14, 42, 132, 429, 1430, 4862, 16796, 58786, 208012, 742900, 2674440, 9694845, 35357670, 129644790, 477638700, 1767263190, 6564120420, 24466267020, 91482563640, 343059613650, 1289904147324, 4861946401452, 9. 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) 9 and N < 50. Write a Java program to check a number is a cyclic or not. Multiply the variable reverse by 10 and add the remainder into it. Sum of the digits in third iteration for 10: 1 + 0 = 1. Expected Output. 62 + 82=100 For example: Some other DISARIUM are 89, 175, 518 etc. Java Interviews can give a hard time to programmers, such is the severity of the process. In this program, you'll learn to check if a number entered by an user is even or odd. The next perfect number is 28 = 1 + 2 + 4 + 7 + 14. The program runs on the following algorithm to check whether a number is Pronic or not. The first few pronic numbers are: Go to the editor Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page. Here we covered over the list of 500+ Java simple programs for beginners to advance, practice & understood how java programming works. Our logic to print the numbers would require two for-loops to achieve this. Inside the while loop, we are extracting each digit of the number into the int variable digit.The extraction of digits of a number is explained in detail here.. 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 19, 21, 22, 23, 25, 26, 27, 29, 31, 32, 33, ……. Divide the number by 10. Run the above Java program, and you shall get the following output. [crayon-6004c9d71379f746741040/] In … Here are some examples of Ramanujan numbers : Example: Number 200 is a Harshad Number because the sum of digits 2 and 0 and 0 is 2(2+0+0) and 200 is divisible by 2. 5! 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. 1882 is indeed a Magic Number. 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. The first perfect number is 6. 20683 = 10^3 + 27^3 = 19^3 + 24^3 (i) input the ISBN code as a 10-digit number (ii) If the ISBN is not a 10-digit number, output the message “Illegal ISBN” and terminate the program (iii) If the number is 10-digit, extract the digits of the number and compute the sum as explained above. Go to the editor For example 0, 1, 153, 370, 371 and 407 are the Armstrong numbers This process is sometimes called the 196-algorithm, after the most famous number associated with the process. * 100000 The value 2n − σ(n) (or n − s(n)) is called the number's deficiency. Java Program to Check Whether a Number is Even or Odd. 46683 = 3^3 + 36^3 = 27^3 + 30^3 We have already seen random number generator in java.In this post, we will address specific query on how to generate random number between 1 to 10.. We can simply use Random class’s nextInt() method to achieve this. //http://introcs.cs.princeton.edu/java/13flow/Ramanujan.java.html We have still not obtained a single digit sum. Example: 6 = 3 + 3 10 = 3 + 7 10 = 5 + 5 Hence, 6 has one odd prime pair 3 and 3. Go to the editorIn mathematics, the Pell numbers are an infinite sequence of integers. First, we find the remainder of the given number by using the modulo (%) operator. 5 Lychrel palindromes: [196, 879, 1997, 7059, 9999]. Expected Output, 17. 1.3 How to check if a String is Palindrome? Expected Output : 8.Write a Java program to print out the first 10 Catalan numbers by extracting them from Pascal's triangle. 4104 = 2^3 + 16^3 = 9^3 + 15^3 Write a Java program to check whether a given number is a happy number or unhappy number. Pyramid Pattern 5 Program in Java Example : Scala Programming Exercises, Practice, Solution. 142857 × 5 = 714285 (With that iteration limit of 500). : thus, 70 is the companion to 29, and 70 = 2 × 29 + 12 = 58 + 12. Expected Output : 82 + 22=68 A number will be called Disarium if the sum of its digits powered with their respective position is equal with the number itself. Write a java class NumGuesserGame in which a computer generates a random number from 1-10. By convention, 1 is included. We can use different ways to display even numbers: In the following example, we have declared a variable named number and initialized it with 100 (the limit to print the even number). The integer 12 is the first abundant number. Perfect number: 4 The first few Fermat numbers are: * 10000 In computer science, regular numbers are often called Hamming numbers, Hamming Numbers are numbers whose only prime factors are 2, 3 and 5. 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. 142857 × 1 = 142857 The first ten amicable pairs are: (220, 284), (1184, 1210), (2620, 2924), (5020, 5564), (6232, 6368), (10744, 10856), (12285, 14595), (17296, 18416), (63020, 76084), and (66928, 66992). Abundant number: 2488, 3. Write a program to check if a number is Mersenne number or not. ; If they are equal then the number is Automorphic else not. In mathematics, a Mersenne number is a number that can be written in the form M(n) = 2n − 1 for some integer n. In number theory, an abundant number is a number for which the sum of its proper divisors is greater than the number itself. Write a Program in Java to check whether a number is an Armstrong Number or not. 13832 = 2^3 + 24^3 = 18^3 + 20^3 Java Program to Count the Number of Vowels and Consonants in a Sentence Java Program to Sort Elements in Lexicographical Order (Dictionary Order) Java Program to Add Two Complex Numbers by Passing Class to a Function 2. Go to the editor In this article, we will learn to print the different Number pattern programs in Java. Java String class, Java Number class are all examples of these wrapper classes which convert a primitive datatype to an object of the class. In number system, ugly numbers are positive numbers whose only prime factors are 2, 3 or 5. Because 11 is less than 21, the number 21 is deficient. Expected Output : 7. Input a number: 8 Write a Java program to check whether a given number is an ugly number. Go to the editor Write a Java program to check whether a given number is a happy number or unhappy number. A pronic number is a number which is the product of two consecutive integers, that is, a number of the form n(n + 1). Go to the editor The algorithm would be same as that of the one used in above example. In mathematics, an automorphic number is a number whose square "ends" in the same digits as the number itself. 142857 × 2 = 285714 Java Program to Print Number Pattern. In order to check the number, we have divided the number by 2 if it does not leave any remainder, the number is even and the print statement prints that number. 40033 = 9^3 + 34^3 = 16^3 + 33^3 244 Lychrel related In number theory, a narcissistic number is a number that is the sum of its own digits each raised to the power of the number of digits. Within the function, we used the If statement to check whether the given number is greater than Zero or Not and if it is True then statements inside the If block will be executed. 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