初识python

Posted 2020-07-16

以下内容在ipython下面操作

## 用type查看类型
In [1]: x = 2
In [2]: type(x)
Out[2]: int

## 两个字符串相加
In [3]: ‘a‘ + ‘b‘
Out[3]: ‘ab‘

## 除
In [4]: 4 / 3
Out[4]: 1

## 
In [5]: 4.0 / 3
Out[5]: 1.3333333333333333

## 表示整除，只取整数部分
In [6]: 4 // 3
Out[6]: 1

## 2的3次方
In [7]: 2 ** 3
Out[7]: 8

## and 和 or
In [8]: not 1 == 2
Out[8]: True

In [9]: 1 ==1 or 1 == 2
Out[9]: True

In [12]: 1 ==1 and 1 == 2
Out[12]: False

四则运算

input() 和raw_input()

#!/usr/bin/python
num1 = input("Please a number: ")
num2 = input("Please a number: ")
print "%s + %s = %s" %(num1,num2,num1 + num2)
print "%s - %s = %s" %(num1,num2,num1 - num2)
print "%s * %s = %s" %(num1,num2,num1 * num2)
print "%s / %s = %s" %(num1,num2,num1 / num2)