Go之基础类型

package main;
 
import (
    "fmt"
    "errors"
)
 
func main() {
    //bool类型
    var isRun = false;
    //数值类型
 
    //有符号整型
    var a int8 = 1;
    var b int16 = 2;
    var c int32 = 3;
    //无符号整型
    var d uint8 = 4;
    var e uint16 = 5;
    var f uint32 = 6;
    //rune是int32的别称，byte是uint8的别称
    var g rune = 7;
    var h byte = 8;
    //不同类型的变量之间不允许互相赋值或操作
    //下面是错误的
    //tmp := a + b;
 
    //浮点数
    var i float32 = 1.23;
    var j float64 = 2.45;
 
    //复数
    var k complex64 = 5+5i;
    var l complex128 = 3+3i;
 
    //字符串
    var str1 string = "hello";
    //go中字符串是否可改变的，下面是错误的
    //str1[0] = 'w';
 
    //如果要改变字符串，需要先转成[]byte类型，修改后再转string
    tmp := []byte(str1);
    tmp[0] = 'w';
    str1 = string(tmp);
 
    //通过+进行字符串连接
    str2 := "hello";
    str3 := str2 + ",go";
 
    //错误类型
    err := errors.New("我是个错误");
    if err != nil {
        fmt.Print(err);
    }
 
    fmt.Printf("%t\n",isRun);
    fmt.Printf("%d %d %d %d %d %d %d %d\n",h);
    fmt.Printf("%f %f\n",j);
    fmt.Printf("%v %v\n",l);
    fmt.Printf("%s\n",str1);
    fmt.Printf("%s\n",str3);
}