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Commit 0c285f9

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‎README.md

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## Iteration #8: Bonus
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In the ×ばつ20 grid below; What is the greatest product of four adjacent numbers in the same direction (up, down, left, right)?
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What is the greatest product of four adjacent numbers? We consider adjacent any four numbers that are next to each other in horizontal, vertical o diagonal.
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Declare a function named `greatestProduct` to find the answer!
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For example, if we have a 5x5 Matrix like:
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[ 1, 2, 3, 4, 5]
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[ 1, 20, 3, 4, 5]
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[ 1, 20, 3, 4, 5]
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[ 1, 20, 3, 4, 5]
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[ 1, 4, 3, 4, 5]
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The greatest product will be the 20x20x20x4 = 32,000;
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Declare a function named `greatestProduct` to find it in the ×ばつ20 grid below!
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```javascript
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const matrix = [

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