# 隐式变量的类型

C# 允许使用关键字`var`隐式声明变量的类型。例如下面两个语句等价：

```csharp
string user = "machine";
var user = "machine";
```

以下代码中的四个`var`声明的变量，对应的C#类型分别是什么？

```csharp
var e = 'c'; 
var f = 10;
var g = 10.2m;
var h = true;
```

## 答案

```csharp
char e = 'c';
int f = 10;
decimal g = 10.2m;
bool h = false;
```

## 选项

### A

```csharp
string e = 'c';
int f = 10;
decimal g = 10.2m;
bool h = false;
```

### B

```csharp
char e = 'c';
int f = 10;
float g = 10.2m;
bool h = false;
```

### C

```csharp
char e = 'c';
int f = 10;
decimal g = 10.2m;
boolean h = false;
```