Factorial (Byte) - Assembly Typing CST Test
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Factorial (Byte) — Assembly Code
Calculates factorial of 5 using loop and register.
section .data
n db 5
fact db 1
section .text
global _start
_start:
mov al, [n]
mov bl, 1
factorial_loop:
mul bl
dec al
cmp al, 1
jg factorial_loop
mov [fact], al
; exit
mov eax, 60
xor edi, edi
syscallAssembly Language Guide
Assembly language is a low-level programming language that provides direct control over hardware. It is symbolic machine code that maps closely to the instructions of a specific CPU architecture, allowing precise manipulation of memory, registers, and processor operations.
Primary Use Cases
- ▸Embedded systems development
- ▸Operating system kernels & bootloaders
- ▸Device drivers & hardware interfacing
- ▸High-performance routines
- ▸Reverse engineering & security research
- ▸Educational purposes (computer architecture learning)
Notable Features
- ▸Direct hardware control
- ▸Symbolic representation of machine instructions
- ▸Low-level memory and register manipulation
- ▸Highly optimized performance
- ▸Architecture-specific instruction sets
Origin & Creator
Assembly languages evolved in the early 1950s alongside the first digital computers, with specific variants for different CPU architectures such as x86, ARM, and MIPS.
Industrial Note
Assembly is used in embedded systems, OS kernels, device drivers, firmware, performance-critical routines, and reverse engineering/security contexts.