Data Types

Compare how basic types are represented across multiple languages and deep dive into their internals.

Cross-Language Reference Table

Click on a highlighted concept to explore detailed comparison and code examples.

Concept	Python	Java	JavaScript	C	C++
Integer	`int`	`int`	`number`	`int`	`int`
Floating Point	`float`	`float / double`	`number`	`float / double`	`float / double`
Boolean	`bool`	`boolean`	`boolean`	`bool / _Bool`	`bool`
String	`str`	`String`	`string`	`char[]`	`std::string`
Null / No Value	`None`	`null`	`null / undefined`	`NULL`	`nullptr`

Select a type primitive below to learn more

Explore integer types (positive/negative whole numbers), boundaries, and exact low-level bit representation across systems.

Learn how real decimal numbers are represented using the IEEE 754 floating-point standard.

Understand truth values (true/false) and how programming systems represent binary logical states.

Explore text sequences, character encoding (ASCII, UTF-8), and internal array structures representing characters.

Learn how compilers represent the absence of a value (e.g., None, null, undefined, nullptr).