From c4eeb404349d10e18e5d379e14b97bcf4e84b510 Mon Sep 17 00:00:00 2001
From: xuwu <zx597813039@gmail.com>
Date: Wed, 31 Mar 2021 07:42:54 +0800
Subject: [PATCH] =?UTF-8?q?feat:=2017=20=E7=AD=94=E6=A1=88?=
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---
 Answer/11-20/17.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 Answer/11-20/17.md

diff --git a/Answer/11-20/17.md b/Answer/11-20/17.md
new file mode 100644
index 0000000..4bcd3e3
--- /dev/null
+++ b/Answer/11-20/17.md
@@ -0,0 +1,14 @@
+```js
+var a = 0
+var b = async () => {
+  a = a + await 10
+  console.log('2', a) // -> ？
+}
+b()
+a++
+console.log('1', a) // -> ？
+```
+
+这道题目大部分读者肯定会想到 `await` 左边是异步代码，因此会先把同步代码执行完，此时 `a` 已经变成 1，所以答案应该是 11。
+
+其实 `a` 为 0 是因为加法运算法，先算左边再算右边，所以会把 0 固定下来。如果我们把题目改成 `await 10 + a` 的话，答案就是 11 了。
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