Here we will see how to calculate area of triangle. We will see two following programs to do this:
1) Program 1: Prompt user for base-width and height of triangle.
2) Program 2: No user interaction: Width and height are specified in the program itself.
Program 1:
/**
* @author: BeginnersBook.com
* @description: Program to Calculate area of Triangle in Java
* with user interaction. Program will prompt user to enter the
* base width and height of the triangle.
*/
import java.util.Scanner;
class AreaTriangleDemo {
public static void main(String args[]) {
Scanner scanner = new Scanner(System.in);
System.out.println("Enter the width of the Triangle:");
double base = scanner.nextDouble();
System.out.println("Enter the height of the Triangle:");
double height = scanner.nextDouble();
//Area = (width*height)/2
double area = (base* height)/2;
System.out.println("Area of Triangle is: " + area);
}
}
Output:
Enter the width of the Triangle: 2 Enter the height of the Triangle: 2 Area of Triangle is: 2.0
Program 2:
/**
* @author: BeginnersBook.com
* @description: Program to Calculate area of Triangle
* with no user interaction.
*/
class AreaTriangleDemo2 {
public static void main(String args[]) {
double base = 20.0;
double height = 110.5;
double area = (base* height)/2;
System.out.println("Area of Triangle is: " + area);
}
}
Output:
Area of Triangle is: 1105.0
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completely coding
package coreJava;
/**
* @author Narayana
*
*/
public class Triangle {
public static void main(String[] args) {
int n=5;
for (int i=1;i<=n ;i++ ){
for (int j=1;j<=i ;j++ ){
System.out.print("*");
}
System.out.println( );
}
}
}