Go Code Snippets

Here is an example of how to generate a random number between two values, in this case 1 and 59, then display it.

package main

import (
    "fmt"
    "math/rand"
    "time"
)

func main() {

    // Minimum and maximum values for random number.
    minVal := 1
    maxVal := 59

    // Set up random number source.
    source := rand.New(rand.NewSource(time.Now().UnixNano()))
    randSource := rand.New(source)

    // Generate random number.
    randomNumber := randSource.Intn(maxVal-minVal+1) + minVal

    // Display the result in the console or terminal.
    fmt.Println(randomNumber)

}

A text file can be read from and processed line by line.

package main

import (
    "bufio"
    "fmt"
    "os"
)

func main() {

    // Open file, assign to variable, along with any errors.
    readFile, err := os.Open("C:\\demo\\demo.txt")

    // Check for any errors in opening the file.
    if err != nil {

        // Display error.
        fmt.Println(err)

    } else {

        // Prepare the file for reading.
        filescanner := bufio.NewScanner(readFile)
        filescanner.Split(bufio.ScanLines)

        // Process the lines in the file.
        for filescanner.Scan() {

            // Display the line in the console/terminal.
            fmt.Println(filescanner.Text())
        }

    }

    // Close the file.
    readFile.Close()

}