From 39abea3d12e39498325d6bd838d7fde953684adf Mon Sep 17 00:00:00 2001
From: Mark McGranaghan <mmcgrana@gmail.com>
Date: Mon, 5 Nov 2012 11:09:00 -0800
Subject: [PATCH] use a function-call example for coercing an apparent int to a
 float. ref #27

---
 examples/constants/constants.go | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/examples/constants/constants.go b/examples/constants/constants.go
index 76f59c1..5ed88a4 100644
--- a/examples/constants/constants.go
+++ b/examples/constants/constants.go
@@ -4,6 +4,7 @@
 package main
 
 import "fmt"
+import "math"
 
 // `const` declares a constant value.
 const s string = "constant"
@@ -18,15 +19,15 @@ func main() {
     // Constant expressions perform arithmetic with
     // arbitrary precision.
     const d = 3e20 / n
+    fmt.Println(d)
 
     // A numeric constant has no type until it's given
     // one, such as by an explicit cast.
     fmt.Println(int64(d))
 
-    // A number can also be given a type by using it in a
+    // A number can be given a type by using it in a
     // context that requires one, such as a variable
-    // assignment or function call. The type it gets
-    // depends on its value.
-    fmt.Println(n) // int
-    fmt.Println(d) // float64
+    // assignment or function call. For example, here
+    // `math.Sin` expects a `float64`.
+    fmt.Println(math.Sin(n))
 }