1.PRint
(1)打印的第一句 。。。。
1print"Hello World!"
注意""和''的使用
1print"i'm paul"#对23print'i'm paul'#错 改为'i \'m paul'
以及""""""和''' '''的使用
1print"""23Hello World!45Hello World!67Hello World!89"""
(2)逗号
print"hello world",'abc'print"i am paul"
结果：
hello world abc
i am paul
print"hello world"'abc'print"i am paul"
结果：
hello world abc
i am paul
print"hello world"'abc',print"i am paul"
结果：
hello world abci am paul
print"hello world"'abc',"i am paul"
语法错误
(3）运算符号
print"now i will count the eggs:"print3+1+2-5+4%2-1/4print3+2>4-2
结果：
now i will count the eggs:
1
True
(4)变量及打印
name ="paul"age= 20height= 70print"let's talk about %s"%nameprint"he's %d years old"%ageprint"he's %d inches tall"%heightprint"let's talk about %r"%nameprint"he's %r years old"%ageprint"he's %r inches tall"%height
print "if i add %d and %d,i get %d."%(age,height,age+height)
let's talk about paul
he's 20 years old
he's 70 inches tall
let's talk about "paul"
he's 20 years old
he's 70inches tall
if i add 20 and 70,i get 90
x ="there are %d types of people."%10printxprint"i said :%r"%x
y="isn't that joke so funny? %r"z=Falseprinty%z
a="this is the left of"b="a string with a right side"printa + b
结果：
there are 10 types of people.
i said :there are 10 types of people.
isn't that joke so funny?False
this is the left of a string with a right side
print"ab"*10
结果：
ab ab ab ab ab ab ab ab ab ab
formatter ="%r %r %r"printformatter %(1,2,3)printformatter %("one","two","three")printformatter %(True,False,True)printformatter %("i had this string","that you could","type up right")
1 2 3
'one' 'two' 'three'
True False True
'i had this string' 'that you could' ' type up right'
1a ="a\nb\nc\n"2printa
结果：
a
b
c