package main
import "fmt"
import "strings"
func main() {
var a string = "hello"
var b string = "world"
//拼接
c := a + b + "good"
fmt.Println("c = " + c)
//截取
index := strings.Index(c, "good")
if -1 != index {
substr := c[0:index]
fmt.Println("substr = " + substr)
} else {
fmt.Println("no string")
}
//遍历
for i, v := range c {
fmt.Println(i, v)
}
}
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