Given a string, write a method that returns the number of occurrences of substrings "baba" or "mama" in the input string recursively. They may overlap. Do not use any loops within your code. Do not use any regular expressions and methods such as matches, split, replaceAll. Test case 1: countBabaMama ("aba babaa amama ma") + 2 Test case 2: countBabaMama ("bababamamama") 4 ->
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- I have to write a recursion method that finds the square root of a number by creating more accurate guesses each time. For some reason, my code is not returning any value and is not terminating at my base case. Can you help me see the issue I am having? import java.util.Scanner; /** * Greek's method to approximate the square root of a given number. */ public class SquareRootComputer { publicstaticvoidmain(String[] args) { // this is your tester // read a value from the user and print the results // along with expected value Scannerin=newScanner(System.in); System.out.println("Please input a value whose square root you would like determined: "); doublex=in.nextDouble(); //makes user input the value for x to determine it's square root. USE 91. System.out.println("The square root of "+x+"is: "+squareRoot(x)); System.out.println("Expected square root value of 91 is: 9.539392014."); in.close(); //closes the scanner to prevent any unintended errors. }…Write a recursive method called doubleDigits that accepts an integer n as a parameter and returns the integer obtained by replacing every digit of n with two of that digit. For example, doubleDigits(348) should return 334488. The call doubleDigits(0) should return 0. Calling doubleDigits on a negative number should return the negation of calling doubleDigits on the corresponding positive number; for example, doubleDigits(–789) should return –778899.Write recursive definition of a method named Combinations that takes two integers n and r as parameters and returns the number of unique combinations of r items from a group of n items. Number of combinations C(n,r) for the given parameters n and r can be computed using the equation: ?(?,?) = ?!?! ∗ (? − ?)! For example, ?(4,3) = ?! should return 4. ?! ∗ (?)! Take the input from the user and make sure that the input is valid. using C++
- Write a method that takes a String and a character as inputs and returns the number of instances of the input character within the input String. For example, if "banana" and 'a' are input into the method, it should return 3. If "apple" and 'p' are input, it should return 2You have a card on which the letter J is written on one side and K on the other. You want to seeall of the possible ways the card will land if you drop it n times. Write a recursive method thatprints each session of dropping the cards with J's and K's. For example if you drop it 4 times in agiven session, all possible ways to drop it are as follows (in exactly the specified order): J J J JJ J J KJ J K JJ J K KJ K J JJ K J KJ K K JJ K K KK J J JK J J KK J K JK J K KK K J JK K J KK K K JK K K KWrite a static recursive method that returns the number of digits in theinteger passed to it as an argument of type int. Allow for both positiveand negative arguments. For example, –120 has three digits. Do not countleading zeros. Embed the method in a program, and test it.
- You have a card on which the letter J is written on one side and K on the other. You want to seeall of the possible ways the card will land if you drop it n times. Write a recursive method thatprints each session of dropping the cards with J's and K's. For example if you drop it 4 times in agiven session, all possible ways to drop it are as follows (in exactly the specified order): (java code)What is the “stopping” case for each (what causes the methods to “end”)? How do you guarantee that the methods will “stop” (infinite loop, infinite recursion)? Which method one is “better”? Why? public static int factorialValue(int n) {int ans = 1;for (int i=1; i <=n;i++) {ans = ans *i;}return ans;} public static int recursiveValue(int n) {if (n == 0) {return 1;}else {return n*factorialValue(n-1);}}A palindrome is a string that reads the same forward and backward. For example,“deed” and “level” are palindromes. Write an algorithm in pseudocode that testswhether a string is a palindrome. Implement your algorithm as a static method inJava. The method should call itself recursively and determine if the string is apalindrome.Write a main method that reads a string from the user as input and pass it to thestatic method. You need to validate the string and make sure it contains only letters(no digits or special characters are allowed). The main method should displaywhether the string is a palindrome or not. a) Read the string from the user and validate it.b) Create a method that calls itself recursively and returns whether thestring is a palindrome or not.c) Include a test table with at least the following test cases:1. Invalid input. For example, string contains a number or specialcharacter.2. A valid string that is a palindrome.3. A valid string that is not a palindrome.
- Here is a recursive method: public static int mystery(int n, int i) { if(n == 1) return i; else if(n % 2 == 0) return mystery(n/2, i+1); else return mystery(3*n + 1, i+1); } What is the return value of the following call? mystery(3,0);Write a method called isAbecedarian that takes a String and returns a boolean indicating whether the word is abecedarian. Your method can be iterative or recursive. in JAVAHow to write a recursive method called palindrome and a non-recursive method called palindromenonrecursive in java that determine if a string is a palidrome (ignore characters that are not letters). Then write a driver to test the two versions of the two methods. (A palindrome is a string that reads the same forward as well as backward. For example, “otto” and “never odd or even” are palindromes)