//DoubleDemo.java
//Application that hardcodes 2 numbers, outputs their sum, product etc.

public class DoubleDemo {
    public static void main (String[] args) {

	//double for real number value (can have .)
	double num1;
	double num2;
	double sum, difference, product, quotient, remainder;
	//Use int for counting, double for measuring.
	
	num1 = 12.5;
	num2 = 5.3;
	
	sum = num1 + num2;
	difference = num1 - num2;
	product = num1 * num2;
	//if one or both of numerator or denominator is double, does real division:
	quotient = num1 / num2;      //real division by zero results in "infinity"
	remainder = num1 % num2;
	
	System.out.println("Sum is " + sum +
			   "\nDifference is " + difference +
			   "\nProduct is " + product +
			   "\nQuotient is " + quotient +
			   "\nRemainder is " + remainder);
    }
}
/*  12  OK

 divide by zero == infinity, not exception.

 doubleVar = intValue   OK
 intVar = doubleValue   syntax error
 
 integers for counting
 real numbers for measuring
 CPU: separate circuitry for integer vs real arithmetic
*/