Python输出语句print函数

print()函数基本使用

打印整形数据

打印浮点型数据

打印字符型数据

>>> print(12)

12

>>> print(12.5)

12.5

>>> print('B')

B

>>> print('WWW.baidu.com')

WWW.baidu.com

>>> x=12

>>> print(12)

12

>>> y=12.88

>>> print(y)

12.88

>>> z='www.bling.com'

>>> print(z)

www.bling.com

>>> print z

www.bling.com

>>> print x,y,z

12 12.88 www.bling.com

>>> print(z,y,z)

('www.bling.com', 12.88, 'www.bling.com')

print格式化输出

print(format(val,fomat_modifier))

var:值

fomat_modifier:格式字

print(12.34567,'m.nf')

m:表示占位数量(m),m有效位时，右对齐

n:表示精度(n)

print x,y  '逗号'连接输出

>>> print(format(12.345678,'6.2f'))12.35

>>> print(format(12.345678,'6.3f'))12.346

>>> print(format(12.345678,'6.9f'))12.345678000

>>> print(format(12.345678,'6.0f'))12

>>> print(format(12.345678,'6.3f'))12.346

>>> print(format(12.345678,'6.2f'))12.35

>>> print(format(12.345678,'9.2f'))12.35

>>> print(format(12.345678,'3.2f'))12.35

>>> print(format(12.345678,'5.2f'))12.35

print()格式化输出format

print(format(val,fomat_modifier))

print(format(0.3456,'.2%'))

>>> print(format(0.3456,'.2%'))34.56%

>>> print(format(0.3456,'.3%'))34.560%

>>> print(format(0.3456,'.6%'))34.560000%

>>> print(format(0.3456,'6.3%'))34.560%

>>> print(format(0.3456,'6.1%'))34.6%

Python输入函数

re = raw_input(prompt)

prompt:提示字符，从键盘读取数据

re:返回值，返回字符串

类型转换：int()(转为整形)、float()(浮点型)

>>> re =raw_input()

www.bling.com>>> print(re)

www.bling.com>>>type(re)

>>> age = raw_input('your age :')

your age :22

>>> age = age +1Traceback (most recent call last):

File"", line 1, in age= age +1TypeError: cannot concatenate'str' and 'int'objects>>> age =int(age)>>>age22

>>> age = age +1

>>>age23

>>>type(age)

>>> age = int(raw_input('PLZ input your age :'))

PLZ input your age :23

>>>type(age)

>>> f1 = float('12.35')>>>type(f1)

>>> weight = float(raw_input('Plz input your weight :'))

Plz input your weight :70.01

>>> print(weight)70.01

>>>type(weight)

>>>