From 2bfc5a9fa712cca4911827f29e1bd0ada7a40c07 Mon Sep 17 00:00:00 2001
From: Dave Tucker <dave@dtucker.co.uk>
Date: Wed, 14 Sep 2016 15:01:12 +0100
Subject: [PATCH] Created SC2007 (markdown)

---
 SC2007.md | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 SC2007.md

diff --git a/SC2007.md b/SC2007.md
new file mode 100644
index 0000000..0f95760
--- /dev/null
+++ b/SC2007.md
@@ -0,0 +1,27 @@
+# Use $((..)) instead of deprecated $[..]
+
+### Problematic code
+
+```sh
+n=1
+n=$[n+1]
+```
+
+### Correct code
+
+```sh
+n=1
+n=$((n+1))
+```
+
+### Rationale
+
+The `$[..]` syntax was deprecated in Bash 2.0 and replaced with the standard `$((..))` syntax from Korn shell
+
+### Exceptions
+
+None.
+
+### See also
+
+- http://unix.stackexchange.com/questions/209833/what-does-a-dollar-sign-followed-by-a-square-bracket-mean-in-bash
\ No newline at end of file