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Explain how to do arithmetic #345

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Mar 14, 2024
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Explain how to do arithmetic #345

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Explain how to do arithmetic
bkmgit Jul 23, 2023
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Update episodes/04-redirection.md
p-j-smith Mar 14, 2024
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Merge branch 'main' into patch-1
p-j-smith Mar 14, 2024
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Expand Up @@ -236,6 +236,23 @@ $ wc -l SRR098026.fastq

Now you can divide this number by four to get the number of sequences in your fastq file.

This can be done using [shell integer arithmetic](https://www.gnu.org/software/bash/manual/html_node/Shell-Arithmetic.html)

```bash
$ echo $((996/4))
```

Note, this will do integer division - if you need floating point arithmetic you can use [bc - an arbitrary precision calculator](https://www.gnu.org/software/bc/manual/html_mono/bc.html)


```bash
$ echo "996/4" | bc
```

```output
249
```

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