How Can the Modulus Operator Help Determine Divisibility?

How to Check Divisibility Using the Modulus Operator

In your Python program, you're attempting to determine if numbers from 1 to 1000 are multiples of 3 or 5. While your approach of using division is conceptually correct, it has a flaw.

Instead of relying on integer division, where the remainder is discarded, you should use the modulus operator, %:

<code class="python">if n % 3 == 0 or n % 5 == 0:
    print(f"{n} is a multiple of 3 or 5")</code>

The modulus operator calculates the remainder when dividing n by 3 or 5. If the remainder is zero, it means n is divisible by that number. Therefore, the above code checks for divisibility and prints the appropriate message.

In your original code, you were incorrectly using integer division (/) which always yields an integer, even if it represents a whole number. This caused your isinstance checks to fail because floating-point numbers are not integers.

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