Go言語で整数を文字列に変換する方法

//Sprintf formats according to a format specifier and returns the resulting string.
func Sprintf(format string, a ...interface{}) string

str := fmt.Sprintf("%d", a)

//Itoa is shorthand for FormatInt(int64(i), 10).
func Itoa(i int) string

func main() {
    num := 100
    str := strconv.Itoa(num)
    fmt.Printf("type:%T value:%#v\n", str, str)
}

//FormatInt returns the string representation of i in the given base, for 2 <= base <= 36. The result uses the lower-case letters ‘a&#39; to ‘z&#39; for digit values >= 10.
func FormatInt(i int64, base int) string

str := strconv.FormatInt(a, 10)

// Atoi returns the result of ParseInt(s, 10, 0) converted to type int.
func Atoi(s string) (int, error)

i,err := strconv.Atoi(a)

// ParseInt interprets a string s in the given base (0, 2 to 36) and
// bit size (0 to 64) and returns the corresponding value i.
func ParseInt(s string, base int, bitSize int) (i int64, err error)

i, err := strconv.ParseInt("123", 10, 32)