07-integers: Add floating-point challenge

Author: razvand

07-integers/floating-point/FloatingPoint.java

@@ -1,4 +1,8 @@
 public class FloatingPoint {
     public static void main(String[] args) {
+        double dollar = 1.00;
+        double dime = 0.10;
+        int number = 7;
+        System.out.println("A dollar less " + number + " dimes is $" + (dollar - number * dime));
     }
 }