Integers (int) are whole numbers without decimal points. They can be positive, negative, or zero. python age = 25 temperature = -10 count = 0 Python integers have no size limit. You can work with numbers as large as your computer's memory allows.
Try 2 ** 100 ( to the power of ) and Python handles it just fine. Use integers for counting things, indexing into lists, and anywhere you need whole numbers. Most programming involves integers more than any other number type.