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add task solution #2257

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26e6187
add task solution
damian-k-dev May 8, 2026
1565f60
add validation for population values
damian-k-dev May 9, 2026
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17 changes: 17 additions & 0 deletions src/scripts/main.js
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Original file line number Diff line number Diff line change
@@ -1,3 +1,20 @@
'use strict';

// write your code here

const countriesPopulation = document.querySelectorAll('.population');
const totalPopulationEl = document.querySelector('.total-population');
const averagePopulationEl = document.querySelector('.average-population');

let totalPopulation = 0;

countriesPopulation.forEach((countryPopulation) => {
totalPopulation += Number(countryPopulation.innerText.replaceAll(',', ''));
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@mateacademy-ai-mentor mateacademy-ai-mentor May 8, 2026

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The task requires validating that the string can be converted to a number before conversion. Currently, if Number() returns NaN (due to invalid text), the entire calculation becomes NaN. Consider using isNaN() check or parseInt() with validation to ensure data integrity.

});

const averagePopulation = totalPopulation / countriesPopulation.length;

totalPopulationEl.innerText = totalPopulation.toLocaleString();
averagePopulationEl.innerText = averagePopulation.toLocaleString('en-GB', {
maximumFractionDigits: 0,
});
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