用表格帮你了解Python数据类型

print("name ", name )

小写字母、数字、下划线组成

b = "is a 'girl'"

print("b =", b)

c = 'Is a "girl"'

print("c = ", c)

输出：

b = is a 'girl'

c = Is a "girl"

不能使用相同的引号

比如 b = 'is a 'girl''

^^^^

SyntaxError: 编程客栈invalid syntax

e = "who"

f = d + " " + e

print("f =", f)

空格

制表符 \t

换行符 \n

d = "find"

e = "who"

f = d + " " + e

print("f =", f)

print("xxxx\nxxxx")

print("yyyy编程客栈tyyyy")

输出：

f = find who

xxxx

xx

www.cppcns.com

yyyy yyyy

print("c = ", c)

print("title =", c.title())

print("upper =", c.upper())

print("lower =", c.lower())

输出：

c = Is a "girl"

编程客栈

title = Is A "Girl"

upper = IS A "GIRL"

lower = is a "girl"

print("'" + g + "'")

print("'" + g.lstrip() + "'")

print("'" + g.rstrip() + "&www.cppcns.com#39;")

print("'" + g.strip() + "'")

输出，用红色标记空格：

' a b c '

'a b c '

' a b c'

'a b c'

n2 = 2

print(n2 / n1)

常见的

除法结果是浮点：

0.6666666666666666

n2 = 2

print(n2 ** n1)

n1 = 3

n2 = 2

print(n1 + n2 * 3)

print((n1 + n2) * 3)

用括号来明确运算次序

输出：

9

15

数字直接转字符串：

print(str(3) + " find")

数字相关变量转字符串：

n1 = 3

print(str(n1) + " find")