Home Backend Development Python Tutorial Detailed introduction to floating point values

Detailed introduction to floating point values

Jun 10, 2017 am 11:34 AM

When dividing two integers in python, by default only the value of the integer can be obtained. However, when the result of division needs to be accurately evaluated, you want to get it after the operation. Floating point values, so how to deal with them? 1. Modify the value of the dividend to a form with a decimal point to obtain a floating point value. This method is only effective when the dividend is known in advance, and this situation means that the value of the dividend is hard-coded and fixed. In most cases it is not feasible; 2. Import a real division module before performing the division operation, so that the floating point result can be obtained when two integers are divided; from __future__ import pision The following is a test The result of: ufo@ufo:~$ python Python 2.7.4 (default, Sep 26 2013, 03:20:56) [GCC 4.7.3] on 

1. Detailed explanation of how to use Python to obtain floating point values ​​after operations

Detailed introduction to floating point values

Introduction: When dividing two integers in python, by default only the value of the integer can be obtained, and when you need to divide the result When performing precise evaluation, you want to get the floating point value after the operation, so how to deal with it?

2. In-depth understanding of MySQL Advanced Drifting (1)

Detailed introduction to floating point values

Introduction: Numeric types Numeric types are roughly divided into two categories: one is an integer, and the other is a floating point number or decimal. The commonly used integer type is the int type, and the allowed range is between (-2147483648, 2147483648). Common types of floating point numbers or decimals are: float, double and decimal types. float type (single-precision floating-point value); double type (double-precision floating-point value); decimal type (used in calculations that require very high precision; these types allow the precision and count of the value to be specified

3. JavaScript Object-Oriented Essentials (1)

Detailed introduction to floating point values

Introduction : Data type In JavaScript, data types are divided into two categories: Primitive types store some simple data, such as true, 5, etc. There are 5 primitive types in JavaScript: boolean: Boolean, the value is true or false number: Number, the value is any Integer type and floating point value string: string, the value is a single character or consecutive characters enclosed by single or double quotes (JavaScript does not distinguish character types) null: empty type, which has only one value: null undefined: undefined , which has only one value: u..

4. Python method of dividing two integers to obtain a floating point value

Introduction: This article mainly introduces the method of dividing two integers to obtain a floating point value in Python. This article directly gives code examples. Friends in need can refer to it

[Related Q&A recommendation]:

javascript - How to understand the rounding error when calculating floating point values ​​in js?

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