package main // We'll show how pointers work in contrast to values with // 2 functions: `zeroval` and `zeroptr`. `zeroval` has an // `int` parameter, so arguments will be passed to it by // value. `zeroval` will get a copy of `ival` distinct // from the one in the calling function. func zeroval(ival int) { ival = 0 } // `zeroptr` in contrast has an `*int` parameter, meaning // that it takes an `int` pointer. The `*iptr` code in the // function body then _dereferences_ the pointer from its // memory address to the current value at that address. // Assigning a value to a dereferenced pointer changes the // value at the referenced address. func zeroptr(iptr *int) { *iptr = 0 } func main() { }