基础代码
# print ("hello world!")
#
# str_a = '123456789'
# #输出字符串
# print(str_a)
# #输出第一个到第五个的所有数字
# print(str_a[0:5])
# #输出从第二个到第八个的数字且每隔三个字符
# print(str_a[1:8:4])
# #输出字符串两次
# print(str_a * 2)
# #连接字符串
# print(str_a + "你好")
# #分割线
# print('-----------')
# #换行
# print('hello \n world')
# #转义符
# print('hello \ world')
# #显示原始字符不会转义
# str_b = r'12345\n'
# print(str_b)
# c = float(input("请输入厘米："))
# m = c / 10
# print('%.1f毫米 =%d厘米' % (m,c))
#随机数1-100之间求和
# sum = 0
# for x in range(101):
# sum += x
# # print(sum)
#1-10之间奇数求和
# sum = 0
# for x in range(1,11):#前闭后开原则
# sum += x
# print(sum)
# import random
# c = random.randint(1,100) #是随机产生x到y的整数，同样是包括x但是不包括y。
# p = 0
# while True:
# p += 1
# num = int(input("请输入数字："))
# if num > c :
# print('小一点')
# elif num < c :
# print('大一点')
# else:
# print('猜对了')
# break
# # 九九乘法表
# for i in range(1,10):
# for s in range(1,i+1):
# print('%d * %d = %d' %(i,s,i * s) ,end='\t')
# print()
#
# from random import randint
#
#
# def roll_dice(n=2):
# """摇色子"""
# total = 0
# for _ in range(n):
# total += randint(1, 6)
# return total
# def add(a=0, b=0, c=0):
# """三个数相加"""
# return a + b + c
# print(roll_dice(3))
# print(add())
# print(add(1))
# print(add(1, 2))
# print(add(1, 2, 3))
# print(add(c=50, a=100, b=200))
s1 = '\'hello, world!\''
s2 = '\n\\hello, world!\\\n'
print(s1, s2, end='')