This post explains how to concatenate a string in Python. As well as how to build strings, search for substrings and much more.

This post shows you how to use arrays in Python and why this data structure is so useful. A foundational skill for data science, coding, and more!

NumPy is known for being fast, but there's always room for improvement. Learn how to use Cython to iterate over NumPy arrays at the speed of C.