使用 for 循环打印一对数字 - Python

Question

我是 python 的初学者，我需要一些案例帮助：我需要打印从 for 循环输入的数字对 - 例如

count_of_numbers = int(input())

for numbers in range(2*count_of_numbers):
    number = int(input())

假设我们输入 3 2 1 4 5 0 4，我需要打印成对数字的总和 - 3 + 2、1 + 4 等。谁能告诉我这是怎么回事？完成了吗？

Answer 1

我试图保留你的大部分代码：

count_of_numbers = int(input("Please enter the number of pairs: "))
  
for i in range(count_of_numbers):
    number1 = int(input("Number 1 = "))
    number2 = int(input("Number 2 = "))
    print ("Sum of " + str(number1) + " and " + str(number2) + " = " + \ 
            str(number1 + number2))

我做了一些修改：

由于循环请求 2 个输入而不是一个，循环只运行到 count_of_numbers。我本可以使用“+ 1”，但更喜欢从零开始，因为未使用变量 i（以前称为 numbers）。
为了指导用户运行这个程序，我在 input() 调用中添加了一些文本

Answer 2

如果您想添加一些输入验证以确保用户输入的是整数：

def get_int_input(prompt: str) -> int:
    num = -1
    while True:
        try:
            num = int(input(prompt))
            break
        except ValueError:
            print("Error: Enter an integer, try again...")
    return num


def main() -> None:
    count_pairs = get_int_input('How many pairs will you like to add: ')
    total = 0
    for i in range(1, count_pairs + 1):
        a = get_int_input(f'Enter number {i}: ')
        b = get_int_input(f'Enter number {i + 1}: ')
        a_plus_b = a + b
        print(f'{a} + {b} = {a_plus_b}')
        total += a_plus_b
    print(f'Overall total = {total}')


if __name__ == '__main__':
    main()

用法示例：

How many pairs will you like to add: 3
Enter number 1: 2
Enter number 2: 1
2 + 1 = 3
Enter number 2: 4
Enter number 3: 5
4 + 5 = 9
Enter number 3: 0
Enter number 4: 4
0 + 4 = 4
Overall total = 16

Answer 3

我想这可以解决您的问题。在您的代码编译器中尝试此代码。我希望你能得到你想要的输出。

count_of_numbers = int(input())
digits = []
for numbers in range(1, 2*count_of_numbers):
    number = int(input())
    digits.append(number)

for i in range(0, len(digits), 2):
    if (i + 1) >= len(digits):
        break
    print(digits[i] + digits[i+1])

Answer 4

简短而甜蜜的解决方案。喜欢就看看吧

您只需输入数字，它会自动添加备选金额。

input_var = list(map(int,input("Enter The Numbers : ").split(' ')))
if len(input_var)%2 != 0:
    input_var.append(0)
for x in range(0,len(input_var),2):
    print(f"""The sum of {input_var[x]} and {input_var[x+1]} is : """,end=' ')
    print(input_var[x] + input_var[x+1])

输出如下：

Enter The Numbers : 3 2 1 4 5 0 4
The sum of 3 and 2 is :  5
The sum of 1 and 4 is :  5
The sum of 5 and 0 is :  5
The sum of 4 and 0 is :  4

If the input length is even then well and fine, if not then it will automatically add last digit with 0

希望你会喜欢。

谢谢:)

使用 for 循环打印一对数字 - Python

Printing pair of numbers using for loop - Python

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