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Python零基础学习笔记(七)—— Number数字类型及其转换

  • 2026-08-25 11:50:44
Python零基础学习笔记(七)—— Number数字类型及其转换

Number数字类型整型：定义变量的方法

  1. 直接法 num1 = 1 num2 = num1
  2. 连续 num1 = num2 = 1
  3. 交互式赋值 num1 num2 = 1,2

浮点型（小数）：由整数部分和小数部分组成num1 = 1.1

复数：实数部分和虚数部分组成 a + bj

数字类型之间的转换如下图

转换结果如下图

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  1. CONNECT:[ UseTime:0.000973s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
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  11. SELECT * FROM `article` WHERE `id` < 512176 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001194s ]
  12. SELECT * FROM `article` WHERE `id` > 512176 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001191s ]
  13. SELECT * FROM `article` WHERE `id` < 512176 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002977s ]
  14. SELECT * FROM `article` WHERE `id` < 512176 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.032887s ]
  15. SELECT * FROM `article` WHERE `id` < 512176 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.013776s ]
0.310528s