Go

数据类型

bool

string

int  int8  int16  int32  int64
uint uint8 uint16 uint32 uint64 uintptr

byte // alias for uint8

rune // alias for int32
     // represents a Unicode code point

float32 float64

complex64 complex128

占位符

https://studygolang.com/articles/21039

实现一个简单的 Sqrt() 函数

package main

import (
    "fmt"
)

func Sqrt(x float64) float64 {
    z := float64(1)
    for i := 0; i < 10; i++ {
        z -= (z * z - x) / (2 * z)
        fmt.Println(z)
    }
    return z
}

func main() {
    fmt.Println(Sqrt(2))
}