# Data Types

In the Go programming language, a "type" refers to the category of value that a variable or expression can hold. Some examples of built-in types in Go include:

* `int`: a signed integer type, capable of holding values from -2^63 to 2^63-1
* `float64`: a 64-bit floating-point type, capable of representing decimal values with a high degree of precision
* `string`: a sequence of Unicode characters
* `bool`: a Boolean type that can hold the values `true` or `false`

You can also create your own custom types by using the `type` keyword. Here's an example of creating a custom type "Myint" which is an int type

```python
type MyInt int
```

Here's an example of creating a struct type `person` which has three fields name, age, and address

```go
type person struct {
    name string
    age int
    address string
}
```

You can also create a custom type by using the `alias` keyword. Here's an example of creating a custom type "MyString" which is an alias of the string type.

```go
type MyString = string
```

You can use these types just like the built-in types. For example, you can create a variable of type `MyInt` and assign it a value:

```java
var myAge MyInt = 30
```

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