ValueError: invalid literal for int() with base 10: 'j' error during Collatz sequence in Python

A Collatz sequence is a sequence of numbers ending in 1. It is said that when a number undergoes a set of specific operations, the last remaining number must be 1.

This article will explain how to write a program to find the collatz sequence for any given number in Python.

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Programming logic behind Collatz sequences

Finding the collatz sequence for a given number in Python follows four operations.

1. Checks if a number is even or odd.
2. For even numbers, the program divides the number n by 2 and prints it.
3. For odd numbers, the program multiplies n by 3, adds 1 to it, and prints it.
4. The program checks to see if the number n has been reduced to 1; if not, it runs again.

For a given number 5, the collatz sequence will be -16,8,4,2,1.

The following sections describe four ways to create programs in Python that display collatz sequences.

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Error ValueError: invalid literal for int() with base 10 Example

Let's take a look at how the error is generated. Below we have a piece of code

import sys


def collatz_seq(numb):