golang中int、float、string数据类型之间的转换

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package main   import (     "fmt"     "strconv" )   func main() {     var num1 int = 88     var num2 int64 = 123     var str111 string = "456"       // int -> string     str1 := strconv.Itoa(num1)     fmt.Printf("%T:%v\n", str1, str1)  // string:88       // int64 -> string     str2 := strconv.FormatInt(num2, 10)  // base: 10代表十进制     fmt.Printf("%T:%v\n", str2, str2)  // string:123       // string -> int     num111, err1 := strconv.Atoi(str111)     fmt.Printf("%T:%v:%v\n", num111, num111, err1)  // int:456:<nil>       // string -> int64     num222, err2 := strconv.ParseInt(str111, 10, 64)     fmt.Printf("%T:%v:%v\n", num222, num222, err2)  // int64:456:<nil>       // string -> float64     num333, err3 := strconv.ParseFloat(str111, 64)     fmt.Printf("%T:%v:%v\n", num333, num333, err3)  //       // int -> float32     num444 := float32(num1)     fmt.Printf("%T:%v\n", num444, num444)       // int -> float64     num555 := float64(num1)     fmt.Printf("%T:%v\n", num555, num555)       // float32 -> int16     num666 := int16(num444)     fmt.Printf("%T:%v\n", num666, num666)   }