# coding=utf-8
# __auther__='a'
"""
创建第一个函数，输出hello,world!
"""
print('hello,world!')
#formate函数用法
age=20
name='jonason'
print('{0} was {1} years old when he wrote this book.'.format(name,age))
#format函数从{0}处开始替换，计数从0开始，等效于以下函数
print(name,'was',age,'years old when he wrote this book')
print('{} was {} years old when he wrote this book.'.format(name,age))
#输出带有引号的字符串，可交叉使用‘与“，也可以在符号前加\
print("'what's your name?'")
print('\'what\'s your name?\'')
#字符串前r表示此为原始字符串，此时转义序列无效
print(r'what is your name\n.')
#简单猜数字游戏，仅猜一次，for循环
number=54
guess=int(input('Please enter an integer:'))
if guess==number:
print('Congratulations, you guessed it.')
elif guess
