init

go.mod

@@ -0,0 +1 @@
+module git.kolaente.de/konrad/multiplication-table

main.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"encoding/csv"
+	"fmt"
+	"log"
+	"os"
+	"strconv"
+)
+
+func main() {
+	fmt.Println("Enter Number:")
+	var number int
+	_, err := fmt.Scanf("%d", &number)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	matrice := make([][]int, number+1)
+
+
+	for i := 0; i <= number; i++ {
+		matrice[i] = make([]int, number+1)
+		for j := 0; j <= number; j++ {
+			matrice[i][j] = (j * i) % number
+		}
+	}
+
+	// Save it
+	if err := csvExport(matrice); err != nil {
+		log.Fatal(err)
+	}
+
+	// output it
+	fmt.Print("\t")
+	for i := 0; i <= number; i++ {
+		fmt.Print(i, "\t")
+	}
+	fmt.Println()
+
+	for rownumber, row := range matrice {
+		fmt.Print(rownumber, "\t")
+		for _, col := range row {
+			fmt.Print(col, "\t")
+		}
+		fmt.Println()
+	}
+
+}
+
+func csvExport(data [][]int) error {
+	file, err := os.Create("result.csv")
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	writer := csv.NewWriter(file)
+	defer writer.Flush()
+
+	//Prepare
+	dataStrings := make([][]string, len(data))
+	for in := range data {
+		dataStrings[in] = make([]string, len(data[in]))
+		for in2, val2 := range data[in] {
+			dataStrings[in][in2] = strconv.Itoa(val2)
+		}
+	}
+
+	for _, value := range dataStrings {
+		if err := writer.Write(value); err != nil {
+			return err // let's return errors if necessary, rather than having a one-size-fits-all error handler
+		}
+	}
+	return nil
+}

result.csv

@@ -0,0 +1,15 @@
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
+0,1,2,3,4,5,6,7,8,9,10,11,12,13,0
+0,2,4,6,8,10,12,0,2,4,6,8,10,12,0
+0,3,6,9,12,1,4,7,10,13,2,5,8,11,0
+0,4,8,12,2,6,10,0,4,8,12,2,6,10,0
+0,5,10,1,6,11,2,7,12,3,8,13,4,9,0
+0,6,12,4,10,2,8,0,6,12,4,10,2,8,0
+0,7,0,7,0,7,0,7,0,7,0,7,0,7,0
+0,8,2,10,4,12,6,0,8,2,10,4,12,6,0
+0,9,4,13,8,3,12,7,2,11,6,1,10,5,0
+0,10,6,2,12,8,4,0,10,6,2,12,8,4,0
+0,11,8,5,2,13,10,7,4,1,12,9,6,3,0
+0,12,10,8,6,4,2,0,12,10,8,6,4,2,0
+0,13,12,11,10,9,8,7,6,5,4,3,2,1,0
+0,0,0,0,0,0,0,0,0,0,0,0,0,0,0