func Int64ToUint64(i int64) (uint64, error) { if i < 0 { return 0, errors.New("cannot convert negative int64 to uint64") } return uint64(i), nil } func main() { posInt := int64(42) negInt := int64(-42) u, err
Converting between types is done via a function with the name of the type to convert to. Golang没有类型的自动转换,需要手动转换类型。也就是说不能拿float乘int var x int = 42 // x has type int f := float64(x) // f has type float64 (ie. 42.0) var y float64 = 11.9 // y has...
EN#string到int int,err := strconv.Atoi(string) #string到int64 int64, err := strco...
var i int64 = -654 fmt.Println(reflect.TypeOf(i)) fmt.Println(i) var s string = strconv.FormatInt(i, 10) fmt.Println(reflect.TypeOf(s)) fmt.Println(s) } int64 -654 string -654 Convert Int to Int16 Int32 Int64 in Golang 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17...
:= int64(9223372036854775807) // MaxInt64 bigIntStr := strconv.FormatInt(bigIntValue, ...
并且小于 int16。如何将此 int 类型变量转换为 uint16？// convert the type and assign to new var...
普通变量类型int,float,string 都可以使用 type (a)这种形式来进行强制类型转换,比如 var a int32 = 10 var b int64 = int64(a) var c float32 = 12.3 var d float64 =float64(c) 1. 2. 3. 4. golang中 指针也是有类型的, package main ...
不是所有数据类型都能转换的,例如string类型转换为int肯定会失败,编译就会报错cannot convert xxx (type string) to type int64; 低精度转换为高精度时是安全的,高精度的值转换为低精度时会丢失精度。上面的变量d与e就是这种情况; 要跨大类型转换,例如string与int的互转,可以使用strconv包提供的函数 3.strconv包...
int64 -654 string -654 1. 2. 3. 4. Convert Int to Int16 Int32 Int64 in Golang packagemainimport("fmt""reflect")funcmain(){variint=10fmt.Println(reflect.TypeOf(i))i16:=int16(i)fmt.Println(reflect.TypeOf(i16))i32:=int32(i)fmt.Println(reflect.TypeOf(i32))i64:=int64(i)fmt....
Int64() } func main() { ip := "192.168.78.123" ipInt := InetAtoN(ip) fmt.Printf("convert string ip [%s] to int: %d\n", ip, ipInt) fmt.Printf("convert int ip [%d] to string: %s\n", ipInt, InetNtoA(ipInt)) } 注:InetAtoN 最好加安全验证,检查 IP 字符串的有效性, ...