From a6622014688a07e18f9c3ff7924c6d872a3a2e9a Mon Sep 17 00:00:00 2001
From: sunorry <sunorry@gmail.com>
Date: Fri, 25 Sep 2015 22:41:57 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=B4=E6=96=B02.0=E6=94=B9=E5=8A=A8?=
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---
 source/chapter2/01_The_Basics.md | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/source/chapter2/01_The_Basics.md b/source/chapter2/01_The_Basics.md
index c4f7d6f6..0a21b78b 100755
--- a/source/chapter2/01_The_Basics.md
+++ b/source/chapter2/01_The_Basics.md
@@ -638,12 +638,13 @@ if let actualNumber = Int(possibleNumber) {
 
 你可以在可选绑定中使用常量和变量。如果你想在`if`语句的第一个分支中操作`actualNumber`的值，你可以改成`if var actualNumber`，这样可选类型包含的值就会被赋给一个变量而非常量。
 
-多个可选绑定可以用逗号分隔，作为一列表达式出现在一个`if`语句中。
+你可以包含多个可选绑定在`if`语句中，并使用`where`子句做布尔值判断。
 
 ```swift
-if let constantName = someOptional, anotherConstantName = someOtherOptional {
-    statements
+if let firstNumber = Int("4"), secondNumber = Int("42") where firstNumber < secondNumber {
+    print("\(firstNumber) < \(secondNumber)")
 }
+// prints "4 < 42"
 ```
 
 <a name="implicityly_unwrapped_optionals"></a>