Divide a number by 3 without using *, /, +, -, % operators

Matheus Mello
Matheus Mello
September 2, 2023
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Dividing a Number by 3 without Traditional Operators 🚀

Do you enjoy tackling coding challenges and finding creative solutions? Well, we have an interesting one for you today! 🎉

The task at hand is to divide a number by 3 but without using the traditional arithmetic operators such as *, /, +, -, or %. 🤯 Don't worry, it might seem tricky at first, but we'll guide you through a couple of easy solutions. Let's dive in! 💪

The Challenge 🧩

Here's the challenge we're trying to solve together:

How would you divide a number by 3 without using *, /, +, -, % operators?

It's important to note that the number can be signed (positive or negative) or unsigned. 📝

Solution 1: Repeated Subtraction ➖➖➖

One of the simplest ways to divide a number by 3 without using the traditional operators is through repeated subtraction. Here's how it works:

  1. Start with the given number, let's call it num.

  2. While num is greater than or equal to 3, subtract 3 from num and increment a counter variable by 1.

  3. Once num is less than 3, we've found our quotient.

Let's illustrate this with an example. Consider num = 10. Here's the step-by-step breakdown:

num = 10
counter = 0

10 >= 3? Yes
Counter = 1
num = 7

7 >= 3? Yes
Counter = 2
num = 4

4 >= 3? Yes
Counter = 3
num = 1

1 >= 3? No

In this example, the quotient of 10 divided by 3 using repeated subtraction is 3. 👍

Solution 2: Bitwise Operations 🖥️

If you're up for a more advanced solution, you can use bitwise operations to divide a number by 3 without traditional operators. Here's how it can be done:

  1. Start with the given number, num.

  2. Right-shift num by 1 bit to divide it by 2.

  3. Add the original num and the right-shifted num together.

  4. Right-shift the result from step 3 by 1 bit again.

  5. Repeat steps 3 and 4 until the result is less than 3.

Let's demonstrate this approach with the same example as before: num = 10.

num = 10

Step 2:
num = num >> 1 = 5

Step 3:
num = num + (num >> 1) = 5 + 2 = 7

Step 4:
num = num >> 1 = 3

Result < 3, Stop.

In this example, the quotient of 10 divided by 3 using bitwise operations is also 3. 👏

Conclusion and Challenge for You! 💡

Congratulations! You've successfully learned two techniques to divide a number by 3 without using traditional operators. 🎉

Now, it's time for your challenge! Take what you've learned and try implementing these solutions in your favorite programming language. It's not only a great exercise but will also test your problem-solving skills. 💪

Once you've completed the challenge, share your experience and any additional insights you gained with us in the comments section below. We'd love to hear from you! 📝❤️

So, what are you waiting for? Start coding and share your results! Happy dividing! 🚀✨

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