Python programming language
Python is
an example of a high-level language; other high-level languages you might have
heard of are C, C++, Perl, and Java. There are also low-level languages, sometimes
referred to as “machine languages” or “assembly languages.
The
high-level program is called the source code, and the translatedprogram is
called the object code or the executable. Once a program is compiled, you can
execute it repeatedly without further translation.
Programs
written in a high-level language have to be processed before they can run.
Python is
considered an interpreted language because Python programs are executed by an interpreter.
There are two ways to use the interpreter: interactive mode and script mode.
In
interactive mode, type Python programs and the interpreter displays the result.
Eg:
>>> 1 + 1
2
Where,
>>> is the prompt the
interpreter uses to indicate that it is ready
In script
mode, type python program in a file and store the file with .py extension and
use the interpreter to execute the contents of the file, which is called a
script.
bug: An error in a program.
debugging: The process of finding and
removing any of the three kinds of programming errors.
syntax: The structure of a program.
syntax error: An error in a program that makes
it impossible to parse (and therefore impossible to interpret).
exception: An error that is detected while
the program is running.
semantics: The meaning of a program.
semantic error: An error in a program that makes
it do something other than what the programmer
intended.
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