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52 lines
943 B
Markdown
52 lines
943 B
Markdown
---
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id: f2e19e3e-e28a-4998-8b0c-38ebfdb559e5
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title: Golang Pointers
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---
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# Basics
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Go also supports pointers. Default value is always NULL and you can't do
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pointer arithmetic. Other than that, nothing that will blow your mind
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here.
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``` go
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package main
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import "fmt"
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func main() {
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i, j := 42, 2701
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p := &i // point to i
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fmt.Println(*p) // read i through the pointer
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*p = 21 // set i through the pointer
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fmt.Println(i) // see the new value of i
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p = &j // point to j
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*p = *p / 37 // divide j through the pointer
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fmt.Println(j) // see the new value of j
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}
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```
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# Pointers to [Golang Structs](20200828181259-structs)
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To facilitate lazy people like me Go allows you to lose the \`\*\` when
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using a pointer to a struct
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``` go
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package main
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import "fmt"
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type Vertex struct {
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X int
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Y int
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}
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func main() {
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v := Vertex{1, 2}
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p := &v
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p.X = 123
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fmt.Println(v)
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}
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```
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