Learn Python programming from scratch
Learn the difference between implicit type conversion Python handles automatically and explicit type conversion you write yourself. Understand coercion rules and safe conversion patterns.
Learn what type casting means in Python, how to cast between integers, floats, strings, and collections, and the difference between casting and conversion.
Learn the critical difference between the is operator for object identity and the double-equals operator for value equality in Python.
Learn how to compare values in Python using comparison operators, chained comparisons, and how different data types behave when compared to each other.
Learn how Python handles numeric precision across integers, floats, and complex numbers. Understand floating-point limitations and how to use Decimal for exact arithmetic.
Learn the most common Python data type mistakes beginners make, including mutable defaults, identity vs equality confusion, and type assumption errors.
Learn what a Python string is, how strings store text as Unicode code points, and why strings are the most used data type in real Python programs.
Learn how to access individual characters in Python strings using zero-based indexing, negative indices, and the len() function to avoid IndexError.
Learn how to extract substrings from Python strings using slice notation with start, stop, and step parameters. Master the most powerful string operation.
Understand why Python strings cannot be changed, what immutability means for your code, and how to work with immutable strings efficiently.
Learn how to format strings in Python using the str.format() method, positional and keyword placeholders, and the format specification mini-language.
Learn how to search and replace text in Python strings using find(), index(), replace(), startswith(), endswith(), and the in operator.
