Question

Write a Program in Java to print the following: 1/1 - 2/2! + 3/3! - 4/4! .......n/n!

Answer 1

import java.io.*;

import java.lang.*;

public class Demo{

public static double pattern_sum(double val){

double residual = 0, factorial_val = 1;

for (int i = 1; i <= val; i++){

factorial_val = factorial_val * i;

residual = residual + (i / factorial_val);

}

return (residual);

}

public static void main(String[] args){

double val = 6;

System.out.println("The sum of the series is : " + pattern_sum(val));

}

}

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