Explain the use of Go's custom types and methods for creating and using custom data types in Go?

In Go, you can create custom types using the type keyword, which allows you to define a new named type based on an existing type. For example, you can create a custom type called MyInt based on the built-in int type like this:

type MyInt int

This creates a new type called **MyInt**, which is essentially an alias for the **int** type. You can then use this new type wherever you would use an **int** type, but it's considered a distinct type by the Go compiler.

You can also define methods on custom types using the **func** keyword followed by the type name and the method name. For example, you can define a method called **Double** on the **MyInt** type like this:

func (i MyInt) Double() MyInt {
    return i * 2
}

This creates a method called **Double** that takes a value of type **MyInt** as its receiver, and returns a value of the same type. The method implementation simply multiplies the receiver by 2 and returns the result.

You can then use this method on any value of type **MyInt**, like this:

var x MyInt = 42
y := x.Double() // y is now 84

This calls the **Double** method on the value **x**, which returns a new value **y** that is twice the value of **x**.

Using custom types and methods can help make your code more readable and maintainable, especially when working with complex data structures or algorithms.