Learn about data types , their importance, and examples in Python and JavaScript. Beginner-friendly guide covering common types , advantages, and best practices. Learn about common data types —booleans, integers, strings, and more—and their importance in the context of gathering data. Originally published on July 17, 2024. A data type is an attribute associated with a piece of data that tells a computer system how to interpret its value. Learn what data types are and how to use them in Python, JavaScript, Java and C++. Find out how to check, convert and cast data types , and how binary values are interpreted. Data type characterizes a variable's attribute; actions also rely on the data type of the variables, as does the data that is stored in variables. The sorts of data that a variable can store are specified by its data types .
