Reading & Writing CSV Files

CSV Helpers

This lesson explains the main concept clearly with beginner-friendly examples and background so you can learn why the code works.

import (
    "encoding/csv"
    "os"
)

func writeCSV(path string, records [][]string) error {
    f, err := os.Create(path)
    if err != nil { return err }
    defer f.Close()
    w := csv.NewWriter(f)
    defer w.Flush()
    return w.WriteAll(records) // writes all rows
}

func readCSV(path string) ([][]string, error) {
    f, err := os.Open(path)
    if err != nil { return nil, err }
    defer f.Close()
    r := csv.NewReader(f)
    return r.ReadAll()
}

Example usage

rows := [][]string{{"id","name"},{"1","Alice"}}
writeCSV("out.csv", rows)