#方法一#從2開始計算i = 2#定義一個變量用於保存結果sum=0while i <= 100: if i % 2 == 0: sum = sum + i else: sum = sum - i i += 1print("2-3+4-5+6...+100=",sum)#方法二n=3sum=2while n<=100 : #n對2取余 if n % 2 != 0: sum = sum - n n = n + 1 else: sum = sum + n n = n + 1print("2-3+4-5+6...+100=",sum)運行結果：
提示：
1!等於1
2!等於1*2
3!等於1*2*3
n!等於1*2*3*...*n
n = int(input("請輸入一個非負的數字：")) # 負數不算階乘def factorial(n): if n == 0: return 1 # 0的階乘是1 else: return n * factorial(n - 1)if __name__ == '__main__': result=factorial(n) print("{}的階乘為:{}".format(n,result))
try: score=float(input('請輸入考試成績：')) if score>=90: print('A') elif 80<=score<90: print('B') elif 70<=score<80: print('C') elif 60<=score<70: print('D') else: print('E')except Exception as e: print('您輸入有誤！')
save_money = float(input("請輸入你要存入銀行的錢："))print("你存了{}元到銀行".format(save_money))total_money = save_money * 2 # 定義變量用於保存總錢數year = 1 # 定義變量用於記錄年份while save_money < total_money: save_money *= (1 + 0.0352) year += 1print("定期利率為3.52%，需要{}年本金和利息才能翻一番！".format(year))
# 方法一 字符串函數調用a = ["I","T","e","s","t","e","r"]print("".join(a))#方法二 for循環a = ["I","T","e","s","t","e","r"]s = ""for item in a: s += itemprint(s)
