Golang React JS Technology Blog

How to read input from console line?

Stdin used to read the data from command line.
After each line press "Enter" and stop writing press "Ctrl+C".

Example

package main

import (
	"io"
	"io/ioutil"
	"log"
	"fmt"
	"os"
)

func main() {
	fmt.Printf("Enter the text:\n")
	writeText, err := os.Open(os.DevNull)
	if err != nil {
		log.Fatalf("failed to open a null device: %s", err)
	}
	defer writeText.Close()
	io.WriteString(writeText,"Write Text")
	
	readText, err := ioutil.ReadAll(os.Stdin)
	if err != nil {
		log.Fatalf("failed to read stdin: %s", err)
	}
	fmt.Printf("\nLength: %d", len(readText))
	fmt.Printf("\nData Read: \n%s", readText)
}

Output

Enter the text:
Go
Python
Java
C++
C

Length: 26
Data Read:
Go
Python
Java
C++
C
Most Helpful This Week
Find length of Channel, Pointer, Slice, String and Map How to fix race condition using Atomic Functions in Golang? Get Year, Month, Day, Hour, Min and Second from a specified date Get Set and Clear Session in Golang Example: ReadAll, ReadDir, and ReadFile from IO Package Copy an array by value and reference into another array