Here is the Java Example for Area of Triangle
public static void main (String args [ ] )
a= (float) 1/2*b*h;
System.out.println("Area of Triangle is "+a);
(float) before 1/2 is used for typecasting. If we divide two integers, the result is also as integer. The benefit of using (float) is that it converts 1/2 into 1.0/2.0 and obviously we get the result as 0.5. If we don't typecast 1/2, then the result of division of two integers is also an integer, hence the result of ½ comes out to be 0, so it is compulsory to typecast an expression which has a / (divide sign).