How are machine language, assembly language, and high-level programming languages different?

Programming languages are categorized by their level of abstraction, which determines how closely they interact with a computer's hardware.12

Machine Language

Machine language consists of numeric codes—strings of binary digits (0s and 1s)—that a computer can execute directly. Because these codes vary by computer architecture and do not resemble human language, they are difficult to read and write.3

Assembly Language

Assembly language is a low-level language that serves as a human-readable step above machine language. It uses short mnemonic codes for instructions and allows programmers to name memory blocks. It requires detailed knowledge of specific computer architecture and is primarily used for tasks like interacting with hardware devices.31

High-Level Languages

High-level languages shield programmers from managing idiosyncratic hardware details. They use notation that is easier to read and write, allowing for greater abstraction. Programs written in these languages must be translated into machine code by a compiler or processed by an interpreter to be executed.12