Create a Go function closure by defining an anonymous function that captures outer scope variables and returns it.
Create a function closure by defining an anonymous function that captures variables from its surrounding scope and assigning it to a variable or returning it immediately. The closure retains access to the outer variables even after the outer function returns.
func makeAdder(x int) func(int) int {
return func(y int) int {
return x + y
}
}
add5 := makeAdder(5)
result := add5(3) // result is 8
A closure is a function that remembers the variables it was created with, even after those variables would normally disappear. It is like a self-contained tool that carries its own settings with it wherever it goes. You use closures when you need to create specialized functions dynamically without writing separate code for each variation.