共计 496 个字符，预计需要花费 2 分钟才能阅读完成。
在 Go 语言中，可以使用 range 关键字来遍历字符串。下面是一个简单的例子：
package main
import ("fmt"
)
func main() {str := "Hello, World!"
for index, char := range str {fmt.Printf("Character at index %d is %c\n", index, char)
}
}
在上面的例子中，我们使用 range 关键字遍历字符串 str，并输出每个字符的索引和字符本身。输出结果为：
Character at index 0 is H
Character at index 1 is e
Character at index 2 is l
Character at index 3 is l
Character at index 4 is o
Character at index 5 is ,
Character at index 6 is
Character at index 7 is W
Character at index 8 is o
Character at index 9 is r
Character at index 10 is l
Character at index 11 is d
Character at index 12 is !
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