How to use the math module to perform mathematical operations in Python 2.x

How to use the math module to perform mathematical operations in Python 2.x

Introduction:
In Python 2.x, the math module is a built-in mathematical function library that provides a large number of mathematical functions and constant. This article will introduce how to import and use the math module, and provide sample code for some common mathematical operations.

1. Import the math module
To use the math module, you first need to import it. You can use the following statement to import the math module:

import math

2. Common mathematical functions
math module provides many common mathematical functions, including rounding functions, power functions, trigonometric functions, logarithmic functions, etc. The following is sample code for some common mathematical functions:

1. Rounding function:

   x = 4.7
   print(math.ceil(x))  # 向上取整，输出结果为 5
   print(math.floor(x))  # 向下取整，输出结果为 4

2. Power function:

   a = 2
   b = 3
   print(math.pow(a, b))  # 幂次计算，输出结果为 8.0
   print(math.sqrt(a))  # 平方根计算，输出结果为 1.4142135623730951

3. Trigonometric function:

   angle = math.pi/2
   print(math.sin(angle))  # 正弦函数，输出结果为 1.0
   print(math.cos(angle))  # 余弦函数，输出结果为 6.123233995736766e-17
   print(math.tan(angle))  # 正切函数，输出结果为 1.633123935319537e+16

4. Logarithmic function:

   num = 10
   print(math.log(num))  # 自然对数函数，输出结果为 2.302585092994046
   print(math.log10(num))  # 以 10 为底的对数函数，输出结果为 1.0

3. Common mathematical constants
math module Many common mathematical constants are also provided, such as pi and natural constants. The following is sample code for some common mathematical constants:

1. Pi and natural constants:

   print(math.pi)  # 圆周率，输出结果为 3.141592653589793
   print(math.e)  # 自然常数，输出结果为 2.718281828459045

   4. Summary
   In Python 2 In .x, it is very simple to perform mathematical operations using the math module. By importing the math module, we can easily use various mathematical functions and constants, including rounding functions, power functions, trigonometric functions, logarithmic functions, etc. At the same time, you can also use the constants provided by the math module to perform mathematical calculations.

   The above is a brief introduction and sample code for using the math module to perform mathematical operations in Python 2.x. I hope this article can help you better understand and use the math module to implement various mathematical calculations and operations.

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