What is the difference between Go's short and long form of function declaration syntax?

Question

Jayant Kumar · Accepted Answer

In Go, there are two forms of function declaration syntax: short form and long form.
The short form is used to declare and define a function at the same time. It uses the func keyword followed by the function name, its parameters (if any), and its return type (if any), followed by the function body enclosed in curly braces. Here's an example:
func add(a, b int) int {
    return a + b
}

The long form is used to declare a function signature separately from its definition. It is often used when defining functions that take functional arguments or to make a type definition implement an interface. It uses the func keyword followed by the function name, its parameters (if any), and its return type (if any), but without the function body. Here's an example:
func add(a, b int) int

// later in the code...
func add(a, b int) int {
    return a + b
}

In the long form, the function signature is followed by a semicolon instead of the function body. The function body is defined later in the code block, and it must match the signature declared earlier.

What is the difference between Go's short and long form of function declaration syntax?

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What is the difference between Go's short and long form of function declaration syntax?

Jayant Kumar @jayantkumar314

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