Write a Java program that calculates the distance between tw

Write a Java program that calculates the distance between two points when a user types the coordinates.

Solution

DistBetPoints.java

import java.util.Scanner;//package for keyboard inputting



//distance = square root of [(a2-a1)squared + (b2-b1)squared]
public class DistBetPoints
{//main class
    static double distance(double a1, double b1, double a2, double b2)
                {
                return Math.sqrt((a2-a1)*(a2-a1) + (b2-b1)*(b2-b1));
                }
    public static void main(String[] args)
    {   //main function
       
            
        double a2, a1, b2, b1;
        double distance;
    
       
        Scanner scan = new Scanner (System.in);
       
        System.out.println(\"Enter the x coordinate for point 1: \");
        a1 = scan.nextDouble();//keyboard inputting
       
        System.out.println(\"Enter the y coordinate for point 1: \");
        b1 = scan.nextDouble();//keyboard inputting
       
        System.out.println(\"Enter the x coordinate for point 2: \");
        a2 = scan.nextDouble();//keyboard inputting
       
        System.out.println(\"Enter the y coordinate for point 2: \");
        b2 = scan.nextDouble();//keyboard inputting
       
        distance = distance(a1,b1,a2,b2);//calling function
       
        System.out.println(\"The distance between the two points is \" + distance + \" .\");
       
    }
   
}

output

Enter the x coordinate for point 1:
0
Enter the y coordinate for point 1:
0
Enter the x coordinate for point 2:
2
Enter the y coordinate for point 2:
2
The distance between the two points is 2.8284271247461903 .