Decode JSON data into Go variables using the json.Unmarshal function from the encoding/json package.
Use json.Unmarshal to decode JSON data into a Go variable by passing the JSON byte slice and a pointer to the target variable.
import "encoding/json"
var data map[string]interface{}
err := json.Unmarshal(jsonBytes, &data)
if err != nil {
// handle error
}
For custom structs, define the struct with json tags and pass a pointer to an instance of that struct.
Unmarshaling is the process of converting a JSON string into a usable Go variable like a struct or map. It matters because your program needs to read data from APIs or files to work with it. Think of it like unpacking a gift: you take the wrapped box (JSON) and put the contents into your hands (Go variable).