Is it possible to insert another block of code with curly braces inside an existing function?

In Go, you cannot simply embed a block of code with curly braces inside a function without declaring a new function or a control structure (e.g., if, for, switch). Curly braces in Go are used to define the body of functions, control structures, and code blocks, but you cannot create arbitrary nested code blocks without context.

An example of correct usage of nested curly braces is an if block inside a function:

func example() {
    x := 10
    if x > 5 {
        fmt.Println("x is greater than 5")
    }
}

But you cannot simply write:

func example() {
    {
        fmt.Println("Nested block")
    }
}

Although such a block with curly braces is syntactically valid and creates a local scope, it is not an "insertion of a code block" in an arbitrary place, but rather a local block that is rarely used without a control structure. In general, Go does not support nested functions, but you can declare anonymous functions and call them inside a function.