The basic strings of golang are converted to int and int64 types

package main

import (
	"fmt"
	"reflect"
	"strconv"
)

func main() {

	var testStr string = "123456"

	// String to int	intNum, _ := (testStr)
	("intNum =", intNum, ", intNum Type is", (intNum))

	// String to int64	int64Num, _ := (testStr, 10, 64)
	("int64Num=", int64Num, ", int64Num Type is", (int64Num))

	// ===================================================

	// int to string	var intNum2 int = 123456
	var str1 string = (intNum2)
	("str1 =", str1, ", str1 Type is", (str1))

	// int64 to string	var int64Num2 int64 = 123456
	var str2 string = (int64Num2, 10)
	("str2 =", str2, ", str2 Type is", (str2))

	("------------------------------------------------------------------------------------------------------------------------------)

	var num3 int = 30
	var num4 int64
	num4 = int64(num3)
	("num3 的Type is %T ,num3= %v \n", num3, num3)
	("num4 的Type is %T ,num4= %v \n", num4, num4)

	var num5 int64 = 20
	var num6 int
	num6 = int(num5)
	("num5 的Type is %T ,num5= %v \n", num5, num5)
	("num6 的Type is %T ,num6= %v \n", num6, num6)
}

// String to intintNum, _ := (testStr)
// int to stringvar str1 string = (intNum2)

// String to int64// Parameter 1: numeric type string// Parameter 2: Category of numeric strings, such as binary, octal, decimal, hexadecimal// Parameter 3: bitSize, which means the limit of the numerical range when string is converted to int64. For example, int8 int16 int32 int64 The value range of different numeric types is different.int64Num, _ := (testStr, 10, 64)
// int64 to string// Parameter 1: Int64 type number. If it is int, int8 int16 int32, you need to use int64 (number) conversion// Parameter 2: A string indicating what kind of binary number to convert int64, such as binary, octal, decimal, and hexadecimal.  The value must be between 2 and 36.var str2 string = (int64Num2, 10) 

var testStr3 string = "e"
int64Num, _ := (testStr3, 16, 8) 
("int64Num=", int64Num, ", int64Num Type is", (int64Num))

var intNum int = int(int64digits)
var int64Num int64 = int64(intnumber)