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Python输入/输出语句

时间:2014-07-18 15:38:09      阅读:259      评论:0      收藏:0      [点我收藏+]

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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,左对齐;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)
<type str>
>>> age = raw_input(your age :)
your age :22
>>> age = age +1

Traceback (most recent call last):
  File "<pyshell#11>", line 1, in <module>
    age = age +1
TypeError: cannot concatenate str and int objects
>>> age = int(age)
>>> age
22
>>> age = age +1
>>> age
23
>>> type(age)
<type int>
>>> age = int(raw_input(PLZ input your age :))
PLZ input your age :23
>>> type(age)
<type int>
>>> f1 = float(12.35)
>>> type(f1)
<type float>
>>> weight = float(raw_input(Plz input your weight :))
Plz input your weight :70.01
>>> print(weight)
70.01
>>> type(weight)
<type float>
>>> 

Python输入/输出语句,布布扣,bubuko.com

Python输入/输出语句

标签:style   blog   color   使用   strong   os   

原文地址:http://www.cnblogs.com/yangml/p/3849971.html

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