Simple Java program to calculate exp(x) using Taylor series.

import java.util.Scanner;

// 2018 TheFlyingKeyboard and released under MIT License
// theflyingkeyboard.net
public class Main {

    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);
        double x;

        System.out.println("Enter x: ");
        x = reader.nextDouble(); //Reads integer from keyboard

        double precision;

        System.out.println("Enter precision: ");
        precision = reader.nextDouble(); //Reads integer from keyboard


        System.out.println("Exponential function of " + x + " is equal to " + exp(x, precision));
    }

    private static double exp(double x, double precision){
        double output = 1.0d;
        int i = 1;
        double currentValue = x;

        while(Math.abs(currentValue) > precision){
            output += currentValue;

            ++i;
            currentValue *= x / i;
        }

        return output;
    }
}

 



Java Calculating Exponential Function exp(x)
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