Question

6.1 Write a program to find and print all four-digit numbers of the type ABCD, where: A+B = C+D.

Answer 1

Language:

Python

Program:

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for i in range(1000,9999):

   num=str(i)

   if int(num[3])+int(num[2]) == int(num[1])+int(num[0]):

       print(i)

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Output:

-- too long to paste or write here--

Explanation:

Using // was a bit tricky here so I converted the 4 digit number (I accessed through the loop) to text and then accessed the number though indices.

Converted it back to integer and checked the given condition with and returned the number.

If you wanna check the sum per number use this insted:

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for i in range(1000,9999):

   num=str(i)

   if int(num[3])+int(num[2]) == int(num[1])+int(num[0]):

       print(int(num[3])+int(num[2]), int(num[1])+int(num[0]),i)

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