Could you change the summation() method so that it handles both positive and negative values? If so, what would need to change in the code? 2829303132 }//end class|else //if position is 2 or morereturn fibonacciSequence(positionN-1)+fibonacciSequence(positionN-2);//add previous 2 position values}//end method 3 public class Recursive {public static void main(String[] args) {System.out.println("Summation of 5 = "+summation(5));System.out.println("Summation of 1 = "+summation(1));System.out.println("Summation of 10 = "+summation(10));System.out.println("Summation of 1 = "+summation(1));System.out.println("Summation of 7 = "+summation(7));407891011121314151617018192021System.out.println("The first position value in Fibonacci Sequence is "+fibonacciSequence(1));System.out.println("The third position value in Fibonacci Sequence is "+fibonacciSequence (3));System.out.println("The seventh position value in Fibonacci Sequence is "+fibonacciSequence(7));System.out.println("The twentith position value in Fibonacci Sequence is "+fibonacciSequence(20));}public static int summation(int n) {//function takes one number and return summation of 1 to nif (n==1) {//if number n is 1, simply return 1return 1;}else {//if n is more than 1return (n + summation(n-1));//add number and call summation(n-1) which will find summation of next lower numbe}//end else}//end methodprivate static int fibonaccisequence(int positionN) {//method takes one position integerif (positionN<=1) {//if position is 0, return 0, if it is 1, return 1return positionN;222324250262787

Code: iam highlighting(bold) the changes I have done to add negative integers also.... import…

Answered: Could you change the summation() method…

Could you change the summation() method so that it handles both positive and negative values? If so, what would need to change in the code?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Math class and its different methods

Java math class consists of arithmetic math methods that performs basic numeric operations such as finding the maximum or minimum of two values, rounding values, logarithmic functions, square root, and trigonometric functions, etc. The Math library functions can be accessed using the header Java.lang.Math. These math methods under Java math class are for our convenience.

Question

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Could you change the summation() method so that it handles both positive and negative values? If so, what would need to change in the code?

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else //if position is 2 or more
return fibonacciSequence(positionN-1)+fibonacciSequence(positionN-2);//add previous 2 position values
}//end method

3 public class Recursive {
public static void main(String[] args) {
System.out.println("Summation of 5 = "+summation(5));
System.out.println("Summation of 1 = "+summation(1));
System.out.println("Summation of 10 = "+summation(10));
System.out.println("Summation of 1 = "+summation(1));
System.out.println("Summation of 7 = "+summation(7));
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System.out.println("The first position value in Fibonacci Sequence is "+fibonacciSequence(1));
System.out.println("The third position value in Fibonacci Sequence is "+fibonacciSequence (3));
System.out.println("The seventh position value in Fibonacci Sequence is "+fibonacciSequence(7));
System.out.println("The twentith position value in Fibonacci Sequence is "+fibonacciSequence(20));
}
public static int summation(int n) {//function takes one number and return summation of 1 to n
if (n==1) {//if number n is 1, simply return 1
return 1;
}
else {//if n is more than 1
return (n + summation(n-1));//add number and call summation(n-1) which will find summation of next lower numbe
}//end else
}//end method
private static int fibonaccisequence(int positionN) {//method takes one position integer
if (positionN<=1) {//if position is 0, return 0, if it is 1, return 1
return positionN;
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