From c03de81059b97a70ca28bf21de76fbf85e10bc0a Mon Sep 17 00:00:00 2001
From: 088haizi <088haizi@gmail.com>
Date: Wed, 4 Jun 2014 21:37:01 +0800
Subject: [PATCH] Update a_swift_tour.md
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“In an if statement, the conditional must be a Boolean expression—this means that code such as if score { ... } is an error, not an implicit comparison to zero.”  译文中 “not an implicit comparison to zero”未做翻译。
---
 source/chapter1/a_swift_tour.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/chapter1/a_swift_tour.md b/source/chapter1/a_swift_tour.md
index 18a39672..40bdf456 100644
--- a/source/chapter1/a_swift_tour.md
+++ b/source/chapter1/a_swift_tour.md
@@ -80,7 +80,7 @@
     }
     teamScore
 
-在`if`语句中，条件必须是一个布尔表达式——像`if score { ... }`这样的代码是错误的。
+在`if`语句中，条件必须是一个布尔表达式——这意味着像`if score { ... }`这样的代码将报错，而不会隐形地与 0 做对比。
 
 你可以一起使用`if`和`let`来处理值缺失的情况。有些变量的值是可选的。一个可选的值可能是一个具体的值或者是`nil`，表示值缺失。在类型后面加一个问号来标记这个变量的值是可选的。