The recursive call in the following method is ____________________. int factorial(int n) { if(n <= 1) return 1; else return(n * factorial(n-1)); }
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The recursive call in the following method is ____________________.
int factorial(int n)
{
if(n <= 1)
return 1;
else
return(n * factorial(n-1));
}
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Solved in 2 steps
- 6.20 LAB: Fibonacci sequence Java? The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the fibonacci() method, which has an index, n, as parameter and returns the nth value in the sequence. Any negative index values should return -1.Q1. Write a Java program that performs the following steps: Prompt the user to input two positive integers: firstNum and secondNum (firstNum must be less than secondNum). Output all odd numbers between firstNum and secondNum. Output the sum of all even numbers between firstNum and secondNum. Output the sum of the square of the odd numbers between firstNum and secondNum. We want to write a Java program to encode a name by creating an array of integers. Write Java method called encodeName that takes a name as a string (without spacing and all lower case) and returns an array of integers of the same size as name whose elements are the number in the alphabet of the corresponding character in name (starting from zero). For example, calling this method with name = “aabed” it should return [0, 0, 1, 4, 3]. Write a printArray method that prints all the elements of an array of integers in one line. Write a main method that calls encodeName and printArray methods to print the…Q1. Write a Java program that performs the following steps: Prompt the user to input two positive integers: firstNum and secondNum (firstNum must be less than secondNum). Output all odd numbers between firstNum and secondNum. Output the sum of all even numbers between firstNum and secondNum. Output the sum of the square of the odd numbers between firstNum and secondNum. Q2. write a Java program to encode a name by creating an array of integers. Write Java method called encodeName that takes a name as a string (without spacing and all lower case) and returns an array of integers of the same size as name whose elements are the number in the alphabet of the corresponding character in name (starting from zero). For example, calling this method with name = “aabed” it should return [0, 0, 1, 4, 3]. Write a printArray method that prints all the elements of an array of integers in one line. Write a main method that calls encodeName and printArray methods to print the array…
- JAVA PROGRAM ASAP ************* THE PROGRAM MUST WORK IN HYPERGRADE AND PASS ALL THE TEST CASES.**************** Chapter 16. PC #8. Sum of Numbers (page 1073) Write a method that accepts an integer argument and returns the sum of all the integers from 1 up to the number passed as an argument. For example, if 50 is passed as an argument, the method will return the sum of 1, 2, 3, 4, . . . 50. Use recursion to calculate the sum. Demonstrate the method in a program. The program should ask the user to enter a number, which is then used to display the sum. if the user enters -1, then exit the program. Test Case 1 Please enter a number to calculate the sum or -1 to exit:\n5ENTERThe sum of first 5 natural numbers is 15.\nPlease enter a number to calculate the sum or -1 to exit:\n10ENTERThe sum of first 10 natural numbers is 55.\nPlease enter a number to calculate the sum or -1 to exit:\n-1ENTER Test Case 2 Please enter a number to calculate the sum or -1 to…java programs Perfect Numbers Write a method isPerfect that determines whether parameter number is a perfect number. Use this method in an application todisplays all the perfect numbers between 1and1000. Display factors of each perfect number and confirm number is "perfect."Java Program Prime Number List Use the isPrime method that you wrote in Programming Challenge 13 in a program that prompts the user to enter an integer number, then displays all prime numbers less than the user number separated by a space. Enter a number: \n10ENTER2 3 5 7 Test Case 2 Enter a number: \n100ENTER2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97
- Coding – Upload all java files to the LMS. The Fibonacci Sequence, Part 1. One of the most famous number sequences in mathematics, the Fibonacci sequence, has a recursive definition. Write a recursive method to calculate the nth Fibonacci number. In your main method, ask for n, and call your method to calculate it. Your method signature must be public static int fib(int n). The formula for the Fibonacci sequence is: fib(n) = fib(n – 1) + fib(n – 2). The Fibonacci Sequence, Part 2. In a new class, modify your main method code from part 1 to create an array of the first n Fibonacci numbers. You will need a loop for this, but do not change the recursive method! Your main method should ask for the value of n, and calculate all values from fib(1) to fib(n). Note: fib(1) = 1 and fib(2) = 1, but you’re using array indexes! Recursive Printing. Create a recursive method, printUp(int n) to print the following pattern for any n>0 rows: (this shows n=5) * ** ** * *** * **** * Also create a…In Java: Ask the user to enter the size of an array. It must be greater than 0. Write a method, inputValidation, that returns the size of the array to the main.C++ Write a recursive program that finds out if n is a Fibonacci number or not. The Fibonacci numbers are 0 1 1 2 3 5 8 13 21 … Your program should have the following interface: Enter a number (enter a negative number to quit): 14 !!!!! Sorry14 is not a Fibonacci number Enter a number (enter a negative number to quit): 13 Yes, you got it, 13 is a Fibonacci number Enter a number (enter a negative number to quit): 22 !!!!! Sorry 22 is not a Fibonacci number Enter a number (enter a negative number to quit): 23 !!!!! Sorry 23 is not a Fibonacci number Enter a number (enter a negative number to quit): 21 Yes, you got it, 21 is a Fibonacci number Enter a number (enter a negative number to quit): -1 (*Thanks – Have a good Day*)
- Lab2.java contains the following code: public final class Lab2 { /** * This is empty by design, Lab2 cannot be instantiated */ private Lab2() { // empty by design } /** * Returns the sum of a consecutive set of numbers from <code> start </code> to <code> end </code>. * * @pre <code> start </code> and <code> end </code> are small enough to let this * method return an int. This means the return value at most requires 4 bytes and * no overflow would happen. * * @param start is an integer number * @param end is an integer number * @return the sum of start + (start + 1) + .... + end */ public static int sum(int start, int end) { //Insert your code here and change the return statement to fit your implementation. return 0; } /** * This method creates a string using the given char * by repeating the character <code> n </code> times. * * @param first is…Make a recursive method for factoring an integer n. First, find a factor f, then recursively factor n / f. This assignment needs a resource class and a driver class; these two classes will need to be in two separate files. The resource class will contain all of the methods and the driver class only needs to call the methods. The driver class needs to have only 5 lines of code. The code needs to be written in Java.Create a new project called Trunc.java . Trunc.java shouldloop around getting floating point (i.e. type double) numbers and displayingboth the number and the running total to the nearest whole number. Theprogram will finish when a number is entered outside of the range -100 to100. The program should use methods to check whether the number is in thisrange, and then rounded to the nearest whole number. (NOTE: Not touse the JAVA Round method, write own method by modifying thecalcTwoDPs method in TwoDPs.java). //TwoDPs.java//Displays running total of numbers in lines of standard input correct to two decimal places.//Uses an out of range number (<-100 or >100) to quit. import java.util.Scanner; public class TwoDPs { public static void main(String[] args) {Scanner input = new Scanner(System.in);double total = 0;boolean flag = true;System.out.println("Use an out of range entry (< -100 or > 100) to quit.");while (flag) {System.out.println("Enter a floating point number on a…