Floyd's triangle

// Java program to print 
// Floyd's triangle 
	
class Test 
{ 
	static float findArea(float a, float b, float c) 
	{ 
		// Length of sides must be positive and sum of any two sides 
		// must be smaller than third side. 
		if (a < 0 || b < 0 || c <0 || (a+b <= c) || 
			a+c <=b || b+c <=a) 
		{ 
			System.out.println("Not a valid triangle"); 
			System.exit(0); 
		} 
		float s = (a+b+c)/2; 
		return (float)Math.sqrt(s*(s-a)*(s-b)*(s-c)); 
	} 
		
	// Driver method 
	public static void main(String[] args) 
	{ 
		float a = 3.0f; 
		float b = 4.0f; 
		float c = 5.0f; 
	
		System.out.println("Area is " + findArea(a, b, c)); 
	} 
}