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 # Exercise 05 - sumAll
 
-Implement a function that takes 2 integers and returns the sum of every number between(and including) them:
+Implement a function that takes 2 integers and returns the sum of every number between (and including) them:
 
 ```javascript
 sumAll(1, 4) // returns the sum of 1 + 2 + 3 + 4 which is 10
 ```
 
+In addition, you should assume the following while implementing your function:
+
+- parameters are not necessarily passed in numerical order
+- negative integers are not valid
+- only integers are valid 
 
 ## Hints