What do you mean by a Program?

What do you mean by a Program?

  • A program is a set of instructions that are grouped together to accomplish a task or tasks.
  • These instructions can be given to a computer.
  • The instructions, called machine code or assembly code consist of things like reading and writing memory, arithmetic operations, and comparisons.
  • These instructions sound simple, it is actually possible to solve a huge group problems with them.
  • The individual instructions that the machine actually quite simple or low-level in computer parlance.

What do you mean by Programming?

  • Computer Programming is the art of making a computer do what you want it (the computer) to do.
  • At the very simplest level it consists of issuing a sequence of commands to a computer to achieve an objective
  • Writing software, computer programs, is describing how to do something. In its simplest form, it is a lot like writing down the steps it takes to do something – a process.
  • Programming will help you learn the importance of clarity of expression.


Programming Language

  • A vocabulary and set of grammatical rules for instructing a computer to perform specific tasks.
  • “A programming language is a machine-readable artificial language designed to express computations that can be performed by a machine, particularly a computer. Programming languages can be used to create programs that specify the behavior of a machine, to express algorithms precisely, or as a mode of human communication.”
  • Many programming languages have some form of written specification of their syntax and semantics

Programming Language

Low Level Languages

  • Machine Language
  • Assembly Language


High Level languages

  • Instructions look more like English and Math
  • Generally result in multiple low level
  • Commands, for a single high level statement.


Machine Language

– Used by early computers

– Executable by machines, almost incomprehensible to humans

– Programming in machine language is very tedious and prone to errors


  • 11001010000100101000010101110100
  • 11000101010001110010101000110010


Assembly Language

– Mnemonics used for instruction codes and memory locations

– Not directly understandable by machine. They must be translated

– Easier for humans to use and still in use today.


  • ADD X, Y, Reg1
  • ADD Reg1, Z, Reg2
  • STORE Reg2 SUM


High Level Programming Language

  • Uses syntax resembling combination of mathematical notation and English
  • Easy for humans to understand.
  • Not understandable by machines, must be translated using a compiler or an interpreter.
  • Programming tools such as integrated programming environment with a debugger are available to aid in programming process.


  • Pascal
  • C
  • C++
  • Java
  • VB.Net
  • C#


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