From bd7cc5ce68bd9e573d22790e1c65851a848ef9f2 Mon Sep 17 00:00:00 2001
From: Anna Wiggins <annabunches@gmail.com>
Date: Wed, 12 Dec 2018 15:06:59 -0500
Subject: [PATCH] Add a simple absolute value function.

---
 2018/internal/util/math.go | 8 ++++++++
 1 file changed, 8 insertions(+)
 create mode 100644 2018/internal/util/math.go

diff --git a/2018/internal/util/math.go b/2018/internal/util/math.go
new file mode 100644
index 0000000..a3bf4bc
--- /dev/null
+++ b/2018/internal/util/math.go
@@ -0,0 +1,8 @@
+package util
+
+func abs(x int) int {
+	if x < 0 {
+		return -x
+	}
+	return x
+}