🚀 Day 17/150 – Find Cube of a Number in Python

 

Day 17/150 – Find Cube of a Number in Python

After learning how to calculate the square of a number, the next step is finding the cube. The cube of a number simply means multiplying the number by itself three times.

👉 Formula:
Cube = n × n × n = n³

In this blog, we’ll explore multiple ways to calculate the cube in Python, along with simple explanations.

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Method 1 – Using Multiplication Operator

The most basic and beginner-friendly approach.

num = 3
cube = num * num * num

print("Cube of the number:", cube)

✅ Explanation:

• We multiply the number three times.
• For num = 3 → 3 * 3 * 3 = 27

👉 Simple and easy to understand.

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Method 2 – Using Exponent Operator **

A cleaner and more Pythonic way.

num = 3
cube = num ** 3

print("Cube:", cube)

✅ Explanation:

• ** means power
• num ** 3 = number raised to power 3

👉 Preferred method in most Python code.

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Method 3 – Taking User Input

Make your program interactive.

num = int(input("Enter a number: "))

cube = num ** 3

print("Cube of the number:", cube)

✅ Explanation:

• input() takes value as string → converted using int()
• Then cube is calculated

👉 Useful for real-world programs.

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Method 4 – Using a Function

Reusable and clean approach.

def find_cube(n):
    return n ** 3

print(find_cube(3))

✅ Explanation:

• def creates a function
• return gives back the result
• You can reuse this function anytime

👉 Best for structured and modular coding.

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Method 5 – Using Lambda Function

A short one-line function.

cube = lambda x: x ** 3

print(cube(3))

✅ Explanation:

• lambda creates an anonymous function
• Perfect for small quick operations

👉 Useful in functional programming and short scripts.

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Key Takeaways

• ✔ num * num * num → best for beginners
• ✔ num ** 3 → clean and Pythonic
• ✔ Functions → reusable and scalable
• ✔ Lambda → quick one-liners
• ✔ Always validate user input in real projects

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Final Thoughts

Even though finding the cube is simple, it helps you understand:

• Mathematical operations in Python
• Code reusability with functions
• Writing clean and efficient code

Mastering these basics builds a strong programming foundation.