Python | 计算给定数字的平方（3种不同方式）

参考链接： C++程序计算数字的幂

Given a number, and we have to calculate its square in Python. 

  给定一个数字，我们必须在Python中计算其平方。  

 Example: 

  例：  

     Input:

    Enter an integer numbers: 8

    Output:

    Square of 8 is 64

 Calculating square is a basic operation in mathematics; here we are calculating the square of a given number by using 3 methods. 

  计算平方是数学中的基本运算。 在这里，我们使用3种方法计算给定数字的平方。  

 By multiplying numbers two times: (number*number) 将数字乘以两倍：( 数字*数字) By using Exponent Operator (**): (number**2) 通过使用指数运算符( ** )：( 数字** 2) By using math.pow() method: (math.pow(number,2)  通过使用math.pow()方法： (math.pow(number，2) 

  1)将数字相乘两次：(数字*数字) (1) By multiplying numbers two times: (number*number)) 

 To find the square of a number - simple multiple the number two times. 

  要查找数字的平方-将数字简单乘以两次。  

 Program: 

  程序：  

 # Python program to calculate square of a number

# Method 1 (using  number*number)

# input a number 

number = int (raw_input ("Enter an integer number: "))

# calculate square

square = number*number

# print

print "Square of {0} is {1} ".format (number, square)

 Output 

  输出量  

     Enter an integer number: 8

    Square of 8 is 64 

  2)通过使用指数运算符(**)：(数字** 2) (2) By using Exponent Operator (**): (number**2)) 

 The another way is to find the square of a given number is to use Exponent Operator (**), it returns the exponential power. This operator is represented by ** 

  另一种查找给定数字平方的方法是使用指数运算符 ( ** )，它返回指数幂。 该运算符由**表示  

 Example: Statement m**n will be calculated as "m to the power of n". 

  示例：语句m ** n将计算为“ m乘以n 的幂” 。  

 Program: 

  程序：  

 # Python program to calculate square of a number

# Method 2 (using  number**2)

# input a number 

number = int (raw_input ("Enter an integer number: "))

# calculate square

square = number**2

# print

print "Square of {0} is {1} ".format (number, square)

 Output 

  输出量  

     Enter an integer number: 8

    Square of 8 is 64 

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  3)通过使用math.pow()方法：(math.pow(number，2) (3) By using math.pow() method: (math.pow(number,2)) 

 pow(m,n) is an inbuilt method of math library, it returns the value of "m to the power n". To use this method, we need to import math library in the program. 

  pow(m，n)是数学库的一种内置方法，它将“ m的值返回给幂n” 。 要使用此方法，我们需要在程序中导入数学库。  

 The statement to import math library is import math. 

  导入数学库的语句是import math 。  

 Program: 

  程序：  

 # Python program to calculate square of a number

# Method 3 (using math.pow () method)

# importing math library 

import math 

# input a number 

number = int (raw_input ("Enter an integer number: "))

# calculate square

square = int(math.pow (number, 2))

# print

print "Square of {0} is {1} ".format (number, square)

 Output 

  输出量  

     Enter an integer number: 8

    Square of 8 is 64 

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  翻译自: https://www.includehelp.com/python/calculate-square-of-a-given-number.aspx