How Do I Check If a Number Is Divisible By Another?

How to Determine if a Number is Divisible by Another

To ascertain whether a number is divisible by another, one must employ the modulus operator, denoted by the percentage symbol (%).

The expression n % k == 0 evaluates to true only if n is an exact multiple of k. Mathematically, this represents the remainder after division.

In your initial attempt, you divided numbers using either integer or floating-point division, both of which are unsuitable for testing divisibility.

Integer division (e.g., n / 3) always generates an integer result, disregarding any remainder. On the other hand, floating-point division (e.g., n / 5) produces a float value, which technically is not an integer even if it is a whole number.

To rectify this issue, use the modulus operator as follows:

<code class="python">if n % 3 == 0:
    print('Multiple of 3!')
if n % 5 == 0:
    print('Multiple of 5!')</code>

This code snippet efficiently checks against both 3 and 5 for divisibility, providing a clear indication of the number's divisibility status.

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