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Part 9B: Clarification to command line argument indexing #4244

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Part 9B: Clarification to command line argument indexing #4244

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2 changes: 2 additions & 0 deletions src/content/9/en/part9b.md
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Expand Up @@ -377,6 +377,8 @@ The reason for this is, that *Number('lol')* returns *NaN*, which is actually of

To prevent this kind of behavior, we have to validate the data given to us from the command line.

(Note that command line arguments start from process.argv[2], as index 0 is the Node binary path and index 1 is the script path.)

The improved version of the multiplicator looks like this:

```js
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