String coordinates of number to excel

// obtain excel coordinate 
func GetEcelAxis(row int, columnCount int) string {
    
	var column = getColumnIndex(columnCount)
	return fmt.Sprintf("%s%d", column, row)
}

// obtain excel The column index 
var columnIndexList = []string{
    "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"}
func getColumnIndex(num int) string {
    
	num--
	var column = columnIndexList[num%26]
	for num = num / 26; num > 0; num = num/26 - 1 {
    
		column = columnIndexList[(num-1)%26] + column
	}
	return column
}

This is mainly an index that converts columns into English letters

func TestGetCellIndex(t *testing.T) {
    
	t.Log(getColumnIndex(26))   //Z
	t.Log(getColumnIndex(27))   //AA
	t.Log(getColumnIndex(676))  //YZ
	t.Log(getColumnIndex(702))  //ZZ
	t.Log(getColumnIndex(1352)) //AYZ
}

Output

 rc_test.go:14: Z
 rc_test.go:15: AA
 rc_test.go:16: YZ
 rc_test.go:17: ZZ
 rc_test.go:18: AYZ