Take input number from the user and print its reverse.

从用户处获取输入号码并打印其反面。

Example:

例：

    Input:
    12345
    Output:
    54321

Here, we are implementing program to reversing a given number using 2 different ways.

在这里，我们正在实施程序，以使用2种不同的方式来反转给定的数字 。

1) Famous approach for reversing the number: Take input from the user and typecast into an integer, then iterate in the loop till num is not become zero, inside the loop:

1) 逆转数字的著名方法 ：从用户输入并将其类型转换为整数，然后在循环中循环直到num在循环内不为零：

• Find out the remainder.

  找出其余的。

• Using this: rev_num = rev_num * 10 + remainder.

  使用这个：rev_num = rev_num * 10 +余数。

• Update that number by diving by 10.

  通过跳水10来更新该数字。

• After coming out of the loop printing the reverse number.

  退出循环后，打印反向编号。

if __name__ == "__main__" :
 
    # take string input from user
    num = int(input('Enter a number: '))
 
    rev_num = 0
 
    # iterate the loop till num is not equal to zero
    while(num) :
        rem = num % 10
        rev_num = rev_num* 10 + rem
        num //= 10
    
    print('Reverse number is: ', rev_num)

Output

输出量

Enter a number: 12345
Reverse number is:  54321

2) Make a user-defined function for reversing the Number: Take input from the user and typecast into integer, thenreverseNum() function call.

2) 制作一个用于反转Number的用户定义函数 ：从用户那里输入输入并将其类型转换为整数，然后调用verseNum()函数。

Inside the function:

函数内部：

• Iterate in the loop till num does not become zero:

  在循环中迭代，直到num不为零：

• Find out the remainder.

  找出其余的。

• Using this: rev_num = rev_num * 10 + remainder.

  使用这个：rev_num = rev_num * 10 +余数。

• Update that number by diving by 10.

  通过跳水10来更新该数字。

• After coming out of the loop returning the reverse number to the main.

  退出循环后，将反向编号返回到主编号。

# define a function for finding 
# reverse of the number
def reverseNum(num) :
    
    rev_num = 0
 
    # iterate the loop till num is not equal to zero
    while(num) :
        rem = num % 10
        rev_num = rev_num* 10 + rem
        num //= 10
 
    return rev_num
 
 
# Main() method
if __name__ == "__main__" :
 
    # take string input from user
    num = int(input('Enter a number: '))
    
    print('Reverse number is: ', reverseNum(num))

Output

输出量

Enter a number: 12345
Reverse number is:  54321

翻译自: https://www.includehelp.com/python/program-to-reverse-a-given-number-2-different-ways.aspx