From 6a0374adb09ffd14992e12ba26b9bb3cfa36c809 Mon Sep 17 00:00:00 2001
From: koalaman <vidar@vidarholen.net>
Date: Sat, 22 Nov 2014 09:01:16 -0800
Subject: [PATCH] Created SC1037 (markdown)

---
 SC1037.md | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 SC1037.md

diff --git a/SC1037.md b/SC1037.md
new file mode 100644
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@@ -0,0 +1,21 @@
+## Without braces, this is $1 plus a literal. Use ${10} instead. 
+
+### Problematic code:
+
+    echo "Ninth parameter: $9"
+    echo "Tenth parameter: $10"
+
+### Correct code:
+
+    echo "Ninth parameter: $9"
+    echo "Tenth parameter: ${10}"
+
+### Rationale:
+
+For legacy reasons, `$10` is interpreted as the variable `$1` followed by the literal string `0`.
+
+Curly braces are needed to tell the shell that both digits are part of the parameter expansion.
+
+### Contraindications
+
+If you wanted the trailing digits to be literal, `${1}0` will make this clear to both humans and shellcheck.
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