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const sumAll = function (a, b) {
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if (!Number.isInteger(a) || !Number.isInteger(b))
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return 'ERROR';
|
|
|
|
if (a < 0 || b < 0)
|
|
return 'ERROR';
|
|
|
|
if (a > b) {
|
|
let temp = b;
|
|
b = a;
|
|
a = temp;
|
|
}
|
|
let ans = 0;
|
|
for (let i = a; i <= b; i++)
|
|
ans += i;
|
|
|
|
return ans;
|
|
}
|
|
|
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module.exports = sumAll
|