#1 print函数（python版本3.3.5）：
>>> help(print)
Help on built-in function print in module builtins:
print(...)
print(value, ..., sep=' ', end='\n', file=sys.stdout, flush=False)
Prints the values to a stream, or to sys.stdout by default.
Optional keyword arguments:
file: a file-like object (stream); defaults to the current sys.stdout.
sep: string inserted between values, default a space.
end: string appended after the last value, default a newline.
flush: whether to forcibly flush the stream.
>>> print('hello world')
hello world
#2 字符串：
>>> print('i love i')
i love i
>>> print('i love '+'i') #连接两个字符串
i love i
>>> print('i love '*8) #重复打印字符串
i love i love i love i love i love i love i love i love
>>> print('i love\n'*8) #\n 换行符
i love
i love
i love
i love
i love
i love
i love
i love
#3 数值（整型）：
>>> print(5+3)
8
>>> 5+3
8
>>> 98765432123456789*98765432123456789
9754610582533150213077274750190521