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What Is A Pointer On Pointer?

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It's a pointer variable which can HOLD the address of another pointer variable. It de-refers twice to point to the data held by the DESIGNATED pointer variable.

var a int
var ptr *int
var pptr **int
a = 3000
ptr = &a
pptr = &ptr
fmt.Printf("Value AVAILABLE at **pptr = %dn", **pptr)
Therefore 'a' can be accessed by **pptr.

It's a pointer variable which can hold the address of another pointer variable. It de-refers twice to point to the data held by the designated pointer variable.

var a int
var ptr *int
var pptr **int
a = 3000
ptr = &a
pptr = &ptr
fmt.Printf("Value available at **pptr = %dn", **pptr)
Therefore 'a' can be accessed by **pptr.


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