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benthecoder/Sum All Numbers in a Range solution 2

Last active June 15, 2019 00:18
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Sum All Numbers in a Range solution 2
function sumAll(arr) {
const max = Math.max(...arr);
const min = Math.min(...arr);
return((min+max)*(max - min +1)/2);
}
console.log(sumAll([1,4]));
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