diff --git a/eBook/17.1.md b/eBook/17.1.md
index c340064b0..bce1a970c 100644
--- a/eBook/17.1.md
+++ b/eBook/17.1.md
@@ -67,7 +67,8 @@ if value, ok := varI.(T); ok {
 
 ```go
     for {
-        if input, open := <-ch; !open {
+        input, open := <-ch
+        if !open {
             break // 通道是关闭的
         }
         Process(input)