Golang : How to write CSV data to file


Tags : csv golang

This tutorial is a continuation from previous tutorial on reading CSV file. The code below will demonstrate how easy it is to write CSV data into a file.

 package main

  import (
 "encoding/csv"
 "fmt"
 "os"
  )

  func main() {
 csvfile, err := os.Create("output.csv")
 if err != nil {
 fmt.Println("Error:", err)
 return
 }
 defer csvfile.Close()

 records := [][]string{{"item1", "value1"}, {"item2", "value2"}, {"item3", "value3"}}

 writer := csv.NewWriter(csvfile)
 for _, record := range records {
 err := writer.Write(record)
 if err != nil {
 fmt.Println("Error:", err)
 return
 }
 }
 writer.Flush()
  }

Content from output.csv file

item1,value1

item2,value2

item3,value3

The code above write a single line of CSV data for each loop. To write all CSV data at once, please see WriteAll at

https://www.socketloop.com/references/golang-encoding-csv-writer-writeall-function-example

Reference :

https://www.socketloop.com/references/golang-encoding-csv-newwriter-function-example

  See also : Golang : How to read CSV file



Tags : csv golang

By Adam Ng

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