创建乘法表答案

【问题标题】：Creating the multiplication table创建乘法表
【发布时间】：2021-07-01 14:26:12
【问题描述】：

我正在尝试创建一个乘法表。用户输入他们的数字列表，程序会输出每个数字的乘法。例如，

3 x 1 = 3
3 x 2= 6 
3 x 3 = 9
......
.....
3 x 12=42

这是我迄今为止尝试过的：

enter code here
N = int(input("How many numbers would you like to multiply?:"))
num = []
q=1
p = 1
count=0



for i in range(0,N):
 add = int(input(f"number {i}:"))
 num.append(add)
 print(num)



for j in num:
     while q <= 12:
         print (j * q, end=" ")
         q+=1

#The result is 
How many numbers would you like to multiply?:3
number 0:2
number 1:6
number 2:5
[2, 6, 5]
2 4 6 8 10 12 14 16 18 20 22 24 
enter code here

如何让程序输出列表中每个数字的所有乘法？

【问题讨论】：

标签： python multiplication

【解决方案1】：

将您的表格存储在字典中，并以您想要的任何方式调用。见以下代码：

def inputmethod():
    N = int(input("How many numbers would you like to multiply?:"))
    num = []
    for i in range(0,N):
        add = int(input(f"number {i}:"))
        num.append(add)
    return num

def multiplication(m,num):
    L = list(range(1,m+1))
    dict_tables = {}
    for n in num:
        dict_tables[n] = [e*n for e in L]
    return dict_tables

def print_tables(dict_tables):
    for key,value in dict_tables.items():
        print(f"Table of {key} is : {value}")

num = inputmethod()
generate_tables = multiplication(12,num)
print_tables(generate_tables)

【讨论】：

【解决方案2】：

我会这样写（以及为什么）：

# More verbose variable names are nice documentation!
num_count = int(input("How many numbers would you like to multiply?:"))

numbers = []
# Start at 1 instead of 0, because humans are used to counting from 1.
for i in range(1, num_count + 1):
    number = int(input(f"number {i}:"))
    numbers.append(number)

print(numbers)

# Loop across the list of numbers you built in the previous step.
for number in numbers:
    # `for i in range(...)` is the canonical Python way to loop over numbers.
    for i in range(1, 13):
        print(number * i, end=" ")

    print()

或者：

...
   for i in range(12):
       print(number * (i + 1), end=" ")
...

得到相同的结果，但我发现迭代我想要使用的实际数字列表要简单得多，尤其是在更复杂的公式中，您引用该变量的次数超过一次。例如，如果你在计算平方和写number * (i + 1) * (i + 1)，而你是我的同事，我会朝你摇摆手指。

【讨论】：