To get work finished by computer there are some
logical/computational instructions in computer memory, this set of instructions
is known as a program. There are special people known as 'Software Developers'
or 'Programmers' who use available programming language to write program. After
loading these programs in computer we can execute them. Basically these are
instructions for CPU (Central Processing Unit) which governs the COMPUTER.
A program is developed for specific tasks, means we use
ability of computer to perform a specific set of sequential actions. We can
write a program to just display "Hello" or we can write a program to
develop an Operating system. Size of the program is from few KB to few GB. It
depends on how many functionalities we are implementing in a program.
Computer can understand only BINARY language so if we want
to issue instructions to computer then they should be in BINARY language only.
And binary language is a sequence of '1’s' and '0’s'. But for human it is very
difficult to understand or write the program/instructions in binary. So there
are options which include use of high level programming language. These
languages are very close to 'English' so user can easily read or write the
program. And there is another program /software which are known as Compiler or
interpreter which converts the programs from higher level language to machine
level language or binary language.
Let us learn in detail in the given video lecture.
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