• A processor understands only machine language instructions, which are strings of 1's and 0's. However, machine language is too obscure and complex for using in software development. So, the language is designed for a specific family of processors that represents various instructions in symbolic code and a more understandable form.
• An Assembly language is a type of low-level programming language that is intended to communicate directly with a computer's hardware.

• It requires less memory and execution time;

• It allows hardware-specific complex jobs in an easier way;

• It is suitable for time-critical jobs;

• It is most suitable for writing interrupt service routines and other memory resident programs.

• Make sure you have set the path of nasm and ld binaries in your PATH environment variable. Now, take the following steps for compiling and linking the above program −

• Type the above code using a text editor and save it as file_name.asm.

• Make sure that you are in the same directory as where you saved file_name.asm.

• To assemble the program, type

nasm -f elf64 file_name.asm

• If there is any error, you will be prompted about that at this stage. Otherwise, an object file of your program named file_name.o will be created.

• To link the object file and create an executable file named file_name, type

ld -o file_name file_name.o

• Execute the program by typing

./file_name

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