There are many examples of the word instruction but there is no defintion of the word instruction. Here is an example of the word instruction used is in the meaning of a computer program. A computer program is a set of instructions that tell a computer what to do. I have found the meaning of instruction on the oxford dictionary in google. The meaning of instruction is detailed information about how something should be done. Another meaning I have found in the dictionary for the word instruction is the word order. Using one of the two meanings for the word instruction that I have found on the oxford English dictionary can someone tell me the defintion of instruction in computer programs?
In computer program the instructions are the code that tell the computer what to do
Every line in a computer program is one or more instructions.
Did you want something like in this wiki article?
Humans can’t comfortably read these instruction so they invented Assembly. Assembly is a very low level language because it maps very closely to machine code. Assembly would look something like:
mov eax, 45 xor ebx, ebx int 80h add eax, 16384 mov ebx, eax mov eax, 45 int 80h
Each of those corresponds to a machine code instruction so this is still considered a low level language. Very little code is written in assembly today, unless you need code that is as fast as possible and as efficient as possible. But processor speed and memory is much cheaper today so it isn’t needed as much as it used to be.
Next up I guess would be a language like C. It has some benefit of being a more abstract language than Assembly but is still fairly efficient. With C you still have a lot of control over things like memory allocation and can be fairly efficient.