Read Text

Go can read a small text file into memory with os.ReadFile.

read_text.go

package main

import (
	"fmt"
	"os"
	"strings"
)

func main() {
	var line = 
	fileName := "go09_read_text.txt"
	content := line + "\n"

	err := os.WriteFile(fileName, []byte(content), 0644)
	if err != nil {
		fmt.Println("writeError=", err != nil)
		return
	}
	defer os.Remove(fileName)

	data, err := os.ReadFile(fileName)
	if err != nil {
		fmt.Println("readError=", err != nil)
		return
	}

	text := strings.TrimSpace(string(data))
	fmt.Println("file=", fileName)
	fmt.Println("text=", text)
	fmt.Println("length=", len(text))
}

package main

import (
	"fmt"
	"os"
	"strings"
)

func main() {
	var line = 
	fileName := "go09_read_text.txt"
	content := line + "\n"

	err := os.WriteFile(fileName, []byte(content), 0644)
	if err != nil {
		fmt.Println("writeError=", err != nil)
		return
	}
	defer os.Remove(fileName)

	data, err := os.ReadFile(fileName)
	if err != nil {
		fmt.Println("readError=", err != nil)
		return
	}

	text := strings.TrimSpace(string(data))
	fmt.Println("file=", fileName)
	fmt.Println("text=", text)
	fmt.Println("length=", len(text))
}

package main

import (
	"fmt"
	"os"
	"strings"
)

func main() {
	var line = 
	fileName := "go09_read_text.txt"
	content := line + "\n"

	err := os.WriteFile(fileName, []byte(content), 0644)
	if err != nil {
		fmt.Println("writeError=", err != nil)
		return
	}
	defer os.Remove(fileName)

	data, err := os.ReadFile(fileName)
	if err != nil {
		fmt.Println("readError=", err != nil)
		return
	}

	text := strings.TrimSpace(string(data))
	fmt.Println("file=", fileName)
	fmt.Println("text=", text)
	fmt.Println("length=", len(text))
}

read file `os.ReadFile` returns the file contents as bytes, which can be converted to a string.