Write a program to check whether the triangle is equilateral, isosceles or scalene triangle

The program first prompts the user to enter three sides of a triangle using the Scanner class. Then it uses a series of if statements to check the type of the triangle.

If all three sides are equal, then the program prints "Equilateral Triangle", which is a triangle with all sides of equal length. If two sides are equal, then the program prints "Isosceles Triangle", which is a triangle with two sides of equal length. Otherwise, the program prints "Scalene Triangle", which is a triangle with no sides of equal length.

This program provides a simple way to determine the type of a triangle based on its sides. However, it is important to note that this program does not check if the sides entered by the user could form a valid triangle or not, as there are conditions to be met in order for a triangle to be valid.

Source Code

import java.util.Scanner;
class Check_Triangle
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);
		System.out.println("Enter Three Sides of Triangle :");
		int side1 = input.nextInt();
		int side2 = input.nextInt();
		int side3 = input.nextInt();
		if(side1 == side2 && side2 == side3)
			System.out.println("Equilateral Triangle.");
		else if(side1 == side2 || side1 == side3 || side2 == side3)
			System.out.println("Isosceles Triangle.");
		else 
			System.out.println("Scalene Triangle.");
	}
}

Output

Enter Three Sides of Triangle :
60
45
45
Isosceles Triangle.