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05_sumAll/README.md

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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:
+
+```javascript
+sumAll(1, 4) // returns the sum of 1 + 2 + 3 + 4 which is 10
+```
+
+
+## Hints
+
+Think about how you would do this on pen and paper and then how you might translate that process into code:
+- make sure you pay attention to the function parameters
+- create a variable to hold the final sum
+- loop through the given numbers ([link](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration))
+- on each iteration add the number to the sum
+- return the sum after finishing the loop