45 lines
1.6 KiB
Markdown
45 lines
1.6 KiB
Markdown
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---
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title: Use the every Method to Check that Every Element in an Array Meets a Criteria
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---
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## Use the every Method to Check that Every Element in an Array Meets a Criteria
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<!-- This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/certifications/javascript-algorithms-and-data-structures/functional-programming/use-the-every-method-to-check-that-every-element-in-an-array-meets-a-criteria/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>. -->
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<!-- The article goes here, in GitHub-flavored Markdown. Feel free to add YouTube videos, images, and CodePen/JSBin embeds -->
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### Problem Explanation:
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Use the `every` method inside the `checkPositive` function to check if every element in `arr` is positive. The function should return a Boolean value.
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#### Relevant Links:
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- [Array.prototype.every()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/every)
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### Hint
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Don't forget `return`.
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## Solution
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```javascript
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function checkPositive(arr) {
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// Add your code below this line
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return arr.every(val => val > 0);
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// Add your code above this line
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}
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checkPositive([1, 2, 3, -4, 5]);
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```
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## Alternative Solution
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```javascript
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function checkPositive(arr) {
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// Add your code below this line
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return arr.every(function(value) {
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return value > 0;
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});
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// Add your code above this line
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}
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checkPositive([1, 2, 3, -4, 5]);
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```
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