String operation

package main

import (
	"fmt"
	"strconv"
	"strings"

	//"go/types"
)




func main()  {
    
	str := "hellow Elements "
	// Statistical length 
	fmt.Println(len(str))
	// String traversal 
	r := []rune(str)
	for i:=0;i<len(r);i++{
    
		fmt.Printf("%c ",r[i])
	}
	// String to integer 
	n,_ := strconv.Atoi("12")
	fmt.Printf("\ntype:%T,date:%d",n,n)
	// Integer to string 
	//%s  character string ,%v Built in format content 
	//%v  Output all values ,%+v Output field types and values ,%#V  Output structure name and structure 
	m := strconv.Itoa(1234)
	fmt.Printf("\ntype:%T,date:%v",m,m)
	// String rotation []byte
	//byte  yes uint8 Another name for , It means only one byte ASCII code 
	println(" ")
	var bytes = []byte("hellow go")
	fmt.Printf("%v",bytes)
	// Determine whether there is a string 
	fmt.Printf("\n Whether there is a string :%v",strings.Contains("safes","sa"))
	// Count the number of strings 
	fmt.Printf("\n%v A string ",strings.Count("safeeeees","e"))
	// Character to comparison 
	// "==" Case sensitive ,EqualFold Indistinguishes 
	fmt.Printf("\n%v",strings.EqualFold("abc","AbC"))
	fmt.Println("abc"=="aBc")
	// Returns the position of the first and last occurrence of a string , No return -1
	fmt.Printf("%v",strings.Index("aaaaaa","a"))
	fmt.Printf("\n%v",strings.LastIndex("aaaaaa","a"))
	// Replace ,n Refers to the number of image replacements ,-1 For all 
	fmt.Printf("\n%v",strings.Replace("go to learn go","go","c  Language ",-1))
	// Split , The result is an array of characters 
	fmt.Printf("\n%v",strings.Split("go to learn go" ," "))
	// Determine whether to start with a string / end 
	fmt.Printf("\n%v",strings.HasPrefix("sdqwe.log","s"))
	fmt.Printf("\n%v",strings.HasSuffix("sdqwe.log","log"))

}