golang中strconv包常用的api

1.func Atoi(s string) (i int, err error)

//string->int
num, _ := strconv.Atoi("123")
fmt.Println(num)//123

2.func Itoa(i int) string

//int->string
str := strconv.Itoa(123)
fmt.Println(str)//"123"

3.func ParseFloat(s string, bitSize int) (f float64, err error)

//string->float64
str2, _ := strconv.ParseFloat("12.56", 64)
fmt.Println(str2)//12.56

4.func FormatFloat(f float64, fmt byte, prec, bitSize int) string

//float64->string，保留4位小数
str3 := strconv.FormatFloat(23.56, 'f', 4, 64)
fmt.Println(str3)//23.5600