In this tutorial, we are going to learn a python program to calculate the cube of a given number.
Problem Statement
For any number that are inputs given by the user, we have to print x3, i.e. cube of that number.
For example:
Case1: If the user inputs the number as 3.
then the output should be ‘27’.
Case2: If the user inputs the number as 8.
then the output should be ‘512’.
Our logic to calculate the cube of a given number
- Our program will take an integer as input from the user.
- It then multiplies the input number with itself twice and finally prints the number as the output of our program.
Algorithm to calculate the cube of a given number
Step 1: Start
Step 2: take an integer input from the user and store it in num variable.
Step 3: print num*num*num
Step 4: Stop
Python Program to Calculate the Cube of a given number
Program 1: Simple Multiplication
num = int(input("Enter a number to calculate cube: "))
result = num * num * num
print(f"The cube of {num} is {result}")
Output:
Enter a number to calculate cube: 5 The cube of 5 is 125
Explanation:
For input 7, the output generated by our program is 5*5*5 i.e. equals 125.
Program 2: Using Exponentiation Operator
Python provides an exponentiation operator (**
) that can be used to raise a number to the power of another.
num = int(input("Enter a number to find its cube: "))
result = num ** 3
print(f"The cube of {num} is {result}")
Output
Enter a number to find its cube: 7 The cube of 7 is 343
Explanation
This function uses the exponentiation operator **
to raise the number to the power of 3, effectively calculating its cube. It’s a clean and Pythonic way to perform power calculations.
Program 3: Using the pow
Function
Python’s built-in pow
function can also be used to calculate powers, which is especially useful in more complex mathematical contexts or where you want to emphasize readability.
num = int(input("Enter a number to find its cube: "))
result = pow(num, 3)
print(f"The cube of {num} is {result}")
Output
Enter a number to find its cube: 5 The cube of 5 is 125
Explanation
Here, pow(num, 3)
calculates the cube of num
. This method uses Python’s built-in pow
function, which is particularly useful for raising numbers to large powers or when you also need to use modulo operations.