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JavaScript - sum only positive numbers in array
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In this article, we would like to show you how to sum only positive numbers in array using JavaScript.
Quick solution:
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var numbers = [1, 2, 3, -4, -5, -6];2
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var sum = 0;4
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for (var i = 0; i < numbers.length; ++i) {6
if (numbers[i] > 0) {7
sum += numbers[i];8
}9
}10
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console.log(sum); // 6
In this example, we create a reusable arrow function that checks if a number is positive and sums it up.
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const sumPositive = (numbers) => {2
let sum = 0;3
for (let i = 0; i < numbers.length; ++i) {4
if (numbers[i] > 0) {5
sum += numbers[i];6
}7
}8
return sum;9
};10
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// Usage example:13
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const result = sumPositive([1, 2, 3, -4, -5, -6]);15
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console.log(result); // 6