From 0ec922c7f4216838437d126d7aebfaabda466ca2 Mon Sep 17 00:00:00 2001
From: Galen Nickel <v-ganick@microsoft.com>
Date: Tue, 27 Mar 2018 15:02:38 -0700
Subject: [PATCH] Fix compass doc errors (#721)

* Fix compass doc errors

* Another heading point error
---
 docs/reference/basic/forever.md         | 15 ++++++++-------
 docs/reference/input/compass-heading.md |  8 ++++----
 docs/reference/serial/write-line.md     |  4 ++--
 3 files changed, 14 insertions(+), 13 deletions(-)

diff --git a/docs/reference/basic/forever.md b/docs/reference/basic/forever.md
index a9202548..c7f9bfb6 100644
--- a/docs/reference/basic/forever.md
+++ b/docs/reference/basic/forever.md
@@ -15,18 +15,19 @@ The following example constantly checks the
 and updates the screen with the direction.
 
 ```blocks
+let degrees = 0
 basic.forever(() => {
-    let heading = input.compassHeading()
-    if (heading < 45) {
+    degrees = input.compassHeading()
+    if (degrees < 45) {
         basic.showString("N")
-    } else if (heading < 135) {
+    } else if (degrees < 135) {
         basic.showString("E")
-    }
-    else if (heading < 225) {
+    } else if (degrees < 225) {
         basic.showString("S")
-    }
-    else {
+    } else if (degrees < 315) {
         basic.showString("W")
+    } else {
+        basic.showString("N")
     }
 })
 ```
diff --git a/docs/reference/input/compass-heading.md b/docs/reference/input/compass-heading.md
index 799410bf..849bbafe 100644
--- a/docs/reference/input/compass-heading.md
+++ b/docs/reference/input/compass-heading.md
@@ -2,7 +2,7 @@
 
 Find which direction on a compass the @boardname@ is facing.
 
-The @boardname@ measures the **compass heading** from `0` to `360`
+The @boardname@ measures the **compass heading** from `0` to `359`
 degrees with its **magnetometer** chip. Different numbers mean north,
 east, south, and west.
 
@@ -12,7 +12,7 @@ input.compassHeading();
 
 ## Returns
 
-* a [number](/types/number) from `0` to `360` degrees, which means the compass heading. If the compass isn't ready, it returns `-1003`.
+* a [number](/types/number) from `0` to `359` degrees, which means the compass heading. If the compass isn't ready, it returns `-1003`.
 
 ## Example
 
@@ -43,11 +43,11 @@ basic.forever(() => {
     if (degrees < 45) {
         basic.showArrow(ArrowNames.North)
     } else if (degrees < 135) {
-        basic.showArrow(ArrowNames.West)
+        basic.showArrow(ArrowNames.East)
     } else if (degrees < 225) {
         basic.showArrow(ArrowNames.South)
     } else if (degrees < 315) {
-        basic.showArrow(ArrowNames.East)
+        basic.showArrow(ArrowNames.West)
     } else {
         basic.showArrow(ArrowNames.North)
     }
diff --git a/docs/reference/serial/write-line.md b/docs/reference/serial/write-line.md
index ef5c46d0..f7528ec8 100644
--- a/docs/reference/serial/write-line.md
+++ b/docs/reference/serial/write-line.md
@@ -35,11 +35,11 @@ basic.forever(() => {
     if (degrees < 45) {
         basic.showArrow(ArrowNames.North)
     } else if (degrees < 135) {
-        basic.showArrow(ArrowNames.West)
+        basic.showArrow(ArrowNames.East)
     } else if (degrees < 225) {
         basic.showArrow(ArrowNames.South)
     } else if (degrees < 315) {
-        basic.showArrow(ArrowNames.East)
+        basic.showArrow(ArrowNames.West)
     } else {
         basic.showArrow(ArrowNames.North)
     }