Java Exercises: Create maximum number of regions obtained by drawing n given straight lines

Java Basic: Exercise-234 with Solution

If you draw a straight line on a plane, the plane is divided into two regions. For example, if you pull two straight lines in parallel, you get three areas, and if you draw vertically one to the other you get 4 areas.

Write a Java program to create maximum number of regions obtained by drawing n given straight lines.
Input:
(1 ≤ n ≤ 10,000)

Sample Solution:

Java Code:

import java.util.*;

public class Main { 
    public static void main(String[] args){ 
        Scanner scan = new Scanner(System.in);
		System.out.println("Input number of straight lines:");
     	int n=scan.nextInt();
		System.out.println("Number of regions:");
        System.out.println((n * (n + 1) >> 1) + 1);
    }
}

Sample Output:

Input number of straight lines:
5
Number of regions:
16

Pictorial Presentation:

Flowchart:

Java Code Editor:

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