Standard Library
io

IO package

The io package provides basic interfaces for I/O primitives, such as reading and writing interfaces. Since these are low-level implementations, they are not inherently safe for concurrent execution.

official docs (opens in a new tab)

Example of using io.Reader

The code snippet below demonstrates the use of io.Reader and io.Writer and can be tried out here (opens in a new tab).

package main
 
import (
	"fmt"
	"io"
	"log"
	"strings"
)
 
func main() {
	// io.Reader implements the standard Read method
	var reader io.Reader = strings.NewReader("Follow The Pattern makes learning efficient!")
	b, err := io.ReadAll(reader)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(string(b))
 
	stringBuilder := strings.Builder{}
 
	// io.Writer implements the standard Write method
	var writer io.Writer = &stringBuilder
 
	fmt.Fprint(writer, "Follow The Pattern")
 
	fmt.Println(stringBuilder.String())
}
osslog