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Java program to calculate the area of a triangle based on given three sides

Given values of the edges, we have to calculate the area of a triangle based on given three sides.
Submitted by Nidhi, on February 26, 2022

Problem statement

In this program, we will read three sides of the triangle from the user and find the area of the triangle. Then we will print the result.

Java program to calculate the area of a triangle based on given three sides

The source code to calculate the area of a triangle based on the given three sides is given below. The given program is compiled and executed successfully.

// Java program to calculate the area of a triangle 
// based on given three sides

import java.util.Scanner;

public class Main {
  static double calcuateAreaTriangle(int a, int b, int c) {
    double s = 0;
    double area = 0;

    s = (double)(a + b + c) / 2;
    area = Math.sqrt(s * (s - a) * (s - b) * (s - c));

    return area;
  }

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

    int a = 0;
    int b = 0;
    int c = 0;

    double area = 0;

    System.out.printf("Enter the First edge of Triangle: ");
    a = SC.nextInt();

    System.out.printf("Enter the Second edge of Triangle: ");
    b = SC.nextInt();

    System.out.printf("Enter the Third edge of Triangle: ");
    c = SC.nextInt();

    area = calcuateAreaTriangle(a, b, c);

    System.out.printf("Area of a triangle: %f\n", area);
  }
}

Output

Enter the First edge of Triangle: 12
Enter the Second edge of Triangle: 10
Enter the Third edge of Triangle: 8
Area of a triangle: 39.686270

Explanation

In the above program, we imported the "java.util.Scanner" package to read input from the user. And, created a public class Main. It contain two static methods calculateAreaTriangle() and main().

The calculateAreaTriangle() method is used to calculate the area of a triangle based on the given edges of the triangle.

The main() method is an entry point for the program. Here, we read the edges of the triangle from the user using the Scanner class. Then we calculated the area of the triangle using the calculateAreaTriangle() method and printed the result.

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