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const sumAll = function (a, b) {
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let max = a > b ? a : b,
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min = a < b ? a : b;
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|
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let sum = 0;
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for (let i = min; i <= max; i++) {
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sum += i;
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}
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return a < 0 || b < 0 || typeof a !== "number" || typeof b !== "number"
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? "ERROR"
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: sum;
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};
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module.exports = sumAll;
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