byStarTW => YSITD: j = str(input("請輸入執行次數，預設值是 '20'：")) #599e9ee5bf862b60ba424c36

byStarTW says to YSITD

j = str(input("請輸入執行次數，預設值是 '20'："))

at Thu, Aug 24, 2017 5:39 PM