GoLang Tutorial - Pointers
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Pointers
A pointer holds the memory address of a value.
Here is the simplest example:
We assigned a value to the variable a. Then, the variable b gets the memory address (location) where the a is stored. So, when we print out the types, a is an int type while b is a pointer type (*int) as shown in the output.
p *int
The p is a pointer to an int.
The & operator generates a pointer to its operand:
i := 42 p = &i
So, the p is a pointer generated by the & operator.
The * operator denotes the pointer's underlying value:
fmt.Println(*p) // read i through the pointer p, this should print 42. *p = 21 // set i through the pointer p fmt.Println(*p) // this should print 21
Code from A Tour of Go: Pointers
Go Tutorial
- GoLang Tutorial - HelloWorld
- Calling code in an external package & go.mod / go.sum files
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