'init'

demo/dem.go

@@ -0,0 +1,44 @@
+package main //同文件包的声明 需要保持一直
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	var s string = "golang你好"
+	fmt.Println(len(s))
+
+	for i, value := range s {
+		fmt.Printf("%d", "%c", i, value)
+	}
+	r := []rune(s)
+	for i := 0; i < len(r); i++ {
+		fmt.Println(r[i])
+	}
+	num1, _ := strconv.Atoi("666")
+	fmt.Println(num1)
+	//整数转成字符串
+	st1 := strconv.Itoa(88)
+	fmt.Println(st1)
+	//统计字符串中有几个相同的
+	count := strings.Count("golanggolang", "golang")
+	fmt.Println(count)
+	//不区分大小写
+	flag := strings.EqualFold("go", "GO")
+	fmt.Println(flag)
+	//区分大小写
+	fmt.Println("hello" == "HELLO")
+	//字符串替换
+	ss := strings.Replace("gogogo", "go", "golang", -1)
+	fmt.Println(ss)
+	//按照字符串，为分割符标识，将字符串进行切割分成字符数组
+	a := strings.Split("java-go", "-")
+	fmt.Println(a)
+	//大小写切换
+	fmt.Println(strings.ToLower("GO"))
+	fmt.Println(strings.ToUpper("go"))
+	//去除空格！
+	fmt.Println(strings.TrimSpace("   go   "))
+
+}