Assembly language is a low-level language used for electronic computers, microprocessors, microcontrollers or other programmable devices. It is also called a symbolic language. In assembly language, mnemonics are used to replace the opcodes of machine instructions, and address symbols (Symbol) or labels are used to replace the addresses of instructions or operands.
In different devices, assembly language corresponds to different machine language instruction sets, which are converted into machine instructions through the assembly process. Generally speaking, a specific assembly language and a specific machine language instruction set have a one-to-one correspondence and are not directly portable between different platforms.
Many assemblers provide additional support mechanisms for program development, assembly control, and auxiliary debugging. Some assembly language programming tools often provide macros, which are also called macro assemblers.
Assembly language is not as widely used in programming as most other programming languages. In today's practical applications, it is usually used in low-level, hardware operations and demanding program optimization situations. Assembly language is required for drivers, embedded operating systems, and real-time running programs.
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