Mention the reason to write conputer instructions in assembly language?

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Q. Mention the reason to write conputer instructions in assembly language?

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Concept understanding — Machine Language and Assembly Language

A computer program is an ordered sequence of binary operations — storing and retrieving data, adding, subtracting, and applying Boolean logic — that the CPU executes; the program itself is stored in memory rather than in the CPU. Every instruction is built from an opcode (the "verb" that says what to do) and an operand (the "noun", the data it acts on). The memory locations the CPU reads and writes under program control are the data addresses, and their contents are data numbers.

Machine language is pure binary code. It is what the CPU actually runs, but it is almost impossible for people to read or write directly. Assembly language is the human-friendly bridge: each machine instruction is written as a short mnemonic (such as ADD or MOV), and an assembler translates these mnemonics into machine code. Because assembly deals directly with the CPU's internal registers and memory, it is called a low-level language.

An assembly program is a series of lines, and each instruction has up to four fields laid out as [label:] mnemonic [operands] [; comment], where the bracketed fields are optional. It is important to separate true instructions (commands to the CPU, like ADD or MOV) from directives such as ORG and END, which are commands to the assembler — ORG fixes where code is placed in memory and END marks the end of the source. This clear structure is what lets an assembler turn readable text into a working program.

[!TLDR]

We write instructions in assembly language for speed, smaller program size, special-purpose control, cost saving, and a better understanding of how the machine actually works.

Machine language is the binary coded language the CPU actually executes, but a long string of 1s and 0s is almost impossible for a person to read or write correctly. Assembly language bridges this gap: each machine instruction is given a short, meaningful mnemonic (such as MOV, ADD, SUBB), and once the program is written these mnemonics are translated into machine code by a process called assembling.

Because assembly deals directly with the internal structure of the CPU (its registers, memory and flags), it is called a low-level language, and this closeness to the hardware is exactly what makes it worthwhile for a microcontroller like the 8051.

The main reasons to write instructions in assembly language are:

To speed computer operation — hand-written assembly can be tuned so the CPU does the job in the fewest possible steps.
To reduce the size of the program — compact code occupies less of the limited on-chip ROM.
To write programs for special situations — hardware-level tasks (timing, direct pin control) are handled precisely.
To save money — smaller, faster code can run on cheaper, smaller memory.
To better understand how the computer operates — you see exactly how each register and flag changes.

[!ANSWER]

Computer instructions are written in assembly language to speed up computer operation, to reduce the size of the program, to write programs for special situations, to save money, and to better understand how the computer operates.

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Q.Mention the reason to write conputer instructions in assembly language?

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