32 lines
487 B
JavaScript
32 lines
487 B
JavaScript
const sumAll = function(start, end){
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if(end<0 || start<0 || typeof(start) !== "number" || typeof(end) !== "number"){
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return "ERROR"
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}else{
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if(end < start){
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end1 = end
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end2 = start
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}else{
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end1 = start
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end2 = end
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}
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return (end1 + end2)*(end2/2)}
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};
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// let total = 0;
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// for (let i = start; i <= end; i++) {
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// total = total + i;
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// }
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// return total;
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// };
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// Do not edit below this line
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module.exports = sumAll;
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