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              Python算術運算符有哪些?【每日一個知識點第93期-Python】

              在任何編程語言中,計算都是最基本的能力,一般來講,計算可以通過運算符和操作數的組合來完成。Python支持的計算類型有很多,各自也都有使用的運算符,今天我們主要來看一下啊算術運算符。


              以下假設變量:?a=10,b=20

              運算符 描述 實例
              + 加 – 兩個對象相加 a + b 輸出結果 30
              減 – 得到負數或是一個數減去另一個數 a – b 輸出結果 -10
              * 乘 – 兩個數相乘或是返回一個被重復若干次的字符串 a * b 輸出結果 200
              / 除 – x除以y b / a 輸出結果 2
              % 取模 – 返回除法的余數 b % a 輸出結果 0
              ** 冪 – 返回x的y次冪 a**b 為10的20次方, 輸出結果 100000000000000000000
              // 取整除 – 返回商的整數部分 9//2 輸出結果 4 , 9.0//2.0 輸出結果 4.0

              以下實例演示了Python所有算術運算符的操作:

              #!/usr/bin/python
              # -*- coding: UTF-8 -*-

              a = 21
              b = 10
              c = 0

              c = a + b
              print “1 – c 的值為:”, c

              c = a – b
              print “2 – c 的值為:”, c

              c = a * b
              print “3 – c 的值為:”, c

              c = a / b
              print “4 – c 的值為:”, c

              c = a % b
              print “5 – c 的值為:”, c

              # 修改變量 a 、b 、c
              a = 2
              b = 3
              c = a**b
              print “6 – c 的值為:”, c

              a = 10
              b = 5
              c = a//b
              print “7 – c 的值為:”, c

              以上實例輸出結果:

              1 - c 的值為: 31
              2 - c 的值為: 11
              3 - c 的值為: 210
              4 - c 的值為: 2
              5 - c 的值為: 1
              6 - c 的值為: 8
              7 - c 的值為: 2

              注意:Python2.x 里,整數除整數,只能得出整數。如果要得到小數部分,把其中一個數改成浮點數即可。

              >>> 1/2
              0
              >>> 1.0/2
              0.5
              >>> 1/float(2)
              0.5

              《Python入門每日一個知識點》欄目是馬哥教育Python年薪20萬+的學員社群特別發起,分享Python工具、Python語法、Python項目等知識點,幫助大家快速的了解Python學習,快速步入Python高薪的快車道。

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