我开始使用 TouchDevelop 进行编程,但我输入了以下错误。
action main ()
var strings := collections → create string collection
strings → set at(1, "I")
strings → set at(2, "II")
strings → set at(3, "III")
strings → set at(4, "IV")
strings → set at(5, "V")
strings → set at(6, "VI")
var x := math → random(6) + 1
var s := strings → at(x)
"The value of dice is " → concat(s) → post to wall # ERROR AT CONCAT(S)