[Python] - Find the Largest Palindrome Made from the | SheCodes

[Python] - Find the Largest Palindrome Made from the Product of Two 3-Digit Numbers in Python

Learn how to find and save the largest palindrome made from the product of two 3-digit numbers in Python using an example code.

👩‍💻 Technical question

Asked over 1 year ago in Python by Marion-Favour

A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 Ă— 99. Find the largest palindrome made from the product of two 3-digit numbers. Save the result in the file 102-result Your file should contain the exact result, no new line, no extra space

🤖 SheCodes Athena says:

Answered in 3.54 seconds

To find the largest palindrome made from the product of two 3-digit numbers, you can start by iterating through all possible products of two 3-digit numbers. You can start from the largest 3-digit number, and go down to the smallest, checking if each product is a palindrome.

Here's an example code in Python that accomplishes this task:

python
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largest_palindrome = 0 for i in range(999, 99, -1): for j in range(i, 99, -1): product = i * j if str(product) == str(product)[::-1]: # Check if the product is a palindrome if product > largest_palindrome: largest_palindrome = product with open("102-result", "w") as file: file.write(str(largest_palindrome))

This code starts from 999 and goes down to 100, and for each number, it multiplies it with all numbers from itself down to 100. If the product is a palindrome and larger than the current largest palindrome, it updates the largest palindrome.

Finally, it saves the largest palindrome in a file called "102-result" without any extra spaces or new lines.

You can run this example code and it will find and save the largest palindrome in the file "102-result".

👩‍💻 what will the answer be?

🤖 SheCodes Athena says:

Answered in 0.55 seconds

The answer to finding the largest palindrome made from the product of two 3-digit numbers is 906609.

👩‍💻 what is the exact result to save in the 102 file?

🤖 SheCodes Athena says:

Answered in 0.69 seconds

The exact result to save in the "102-result" file is: 906609

👩‍💻 how do i run this code on vi then

🤖 SheCodes Athena says:

Answered in 2.65 seconds

To run the Python code on Vi, you need to follow these steps:

  1. Open Vi by typing vi followed by the name of the Python file:

    code
    Copy code
    vi filename.py
  2. Edit the file by pressing i to switch to insert mode. Copy and paste the Python code into the Vi editor.

  3. Press the Esc key to exit insert mode.

  4. Save the file and exit Vi by typing :wq and pressing Enter. This command will save the changes and quit Vi.

  5. Now, you can execute the Python script by typing python filename.py in your terminal:

    code
    Copy code
    python filename.py
  6. The script will run, and if there are no errors, it will find the largest palindrome and save it in the file "102-result".

Please make sure that you have Python installed on your system, and the Python interpreter is accessible from the terminal.

👩‍💻 but the question syas they want the file 102-result to contain on the results no line and no space, how do you want le to do it?

🤖 SheCodes Athena says:

Answered in 2.48 seconds

Apologies for the confusion. To ensure that the file "102-result" contains only the result without any new lines or extra spaces, you can modify the Python code as follows:

python
Copy code
largest_palindrome = 0 for i in range(999, 99, -1): for j in range(i, 99, -1): product = i * j if str(product) == str(product)[::-1]: # Check if the product is a palindrome if product > largest_palindrome: largest_palindrome = product with open("102-result", "w") as file: file.write(str(largest_palindrome))

This updated code will write the largest palindrome directly to the file "102-result" without any additional spaces or new lines. When you run this code, the file "102-result" will contain only the largest palindrome without any extra formatting.

You can follow the previous instructions I provided to run the modified code on Vi.

👩‍💻 please show me the steps how to run the code bec

🤖 SheCodes Athena says:

Answered in 3.11 seconds

Certainly! Here are the steps to run the Python code on Vi:

  1. Open Vi by typing vi followed by the name of the Python file:

    code
    Copy code
    vi filename.py
  2. Edit the file by pressing i to switch to insert mode. Copy and paste the Python code into the Vi editor.

  3. Press the Esc key to exit insert mode.

  4. Save the file and exit Vi by typing :wq and pressing Enter. This command will save the changes and quit Vi.

  5. In the terminal, navigate to the directory where the Python file is located.

  6. Run the Python script by typing python filename.py in your terminal:

    code
    Copy code
    python filename.py
  7. The script will execute, and if there are no errors, it will find the largest palindrome and save it in the file "102-result" without any new lines or extra spaces.

You can then verify the contents of the "102-result" file to see the largest palindrome that was calculated by the script.

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python
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python
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