package main
import "fmt"
func main() {
var factorial int64 = 1
var number int
fmt.Print("请输入一个整型:")
fmt.Scanf("%d", &number)
for i := 1; i <= number; i++ {
factorial = factorial * int64(i)
}
fmt.Printf("%d的阶乘是%d\n", number, factorial)
}
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