RE: How to calculate the sum of a range? Using a loop

How can I calculate the sum of all the values in the range between x and y ‚Äč‚Äčthat were output when the function executes so that after each complete loop it repeats decrementing y by one until *y * will not reach x. For example: rangeSum(0, 3); --> result: 10 (0+1+2+3+0+1+2+0+1+0)

I just don't know how to do it because I'm new to JS.

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Here is a simple approach using JavaScript `for` loops. We will loop starting from `x` up to `y` and keep reducing `y` by 1 every time the loop completes. We will store all the sums in variable `total`. ```javascript function rangeSum(x, y) { var total = 0; while(y >= x) { for(let i = x; i <= y; i++) { total += i; } y--; } return total; } console.log(rangeSum(0, 3)); // Outputs: 10 ``` In this function `rangeSum`, the outer `while` loop will keep decreasing `y` till `y` is not less than `x`. The inner `for` loop will keep adding `i` to `total` from `x` to `y`. This way you can get the sum of the range of numbers between `x` and `y` inclusive, and repeating the calculation after decrementing `y`. This function should give you the desired output. However, keep in mind that this function has a time complexity of `O(n^2)` due to the nested loops. Practicing with such simple functions will give you a good grasp over loops and conditionals in JavaScript. Happy Coding!
Answered on July 11, 2023.
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