Pointers in Go 관련

The Go Handbook – Learn Golang for Beginners

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Golang is an awesome, simple, modern, and fast programming language. It’s compiled, open source, and strongly typed. Golang – also called Go – was created by Google engineers with these main goals: make their projects compile (and run) faster be sim...

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The Go Handbook – Learn Golang for Beginners

Golang is an awesome, simple, modern, and fast programming language. It’s compiled, open source, and strongly typed. Golang – also called Go – was created by Google engineers with these main goals: make their projects compile (and run) faster be sim...

Go supports pointers.

Suppose you have a variable:

age := 20

Using &age you get the pointer to the variable, its memory address.

When you have the pointer to the variable, you can get the value it points to by using the * operator:

age := 20
ageptr = &age
agevalue = *ageptr

This is useful when you want to call a function and pass the variable as a parameter. Go by default copies the value of the variable inside the function, so this will not change the value of age:

func increment(a int) {
    a = a + 1
}

func main() {
    age := 20
    increment(age)

    //age is still 20
}

You can use pointers for this:

func increment(a *int) {
    *a = *a + 1
}

func main() {
    age := 20
    increment(&age)

    //age is now 21
}