White Belt Mastery - Python Programming for beginners: Learn Python in a step by step approach, Complete practical crash course to learn Python coding

Python is extensively used general purpose, high level popular programming language created by Guido van Rossum in 1991. As per Github's octoverse, Python is the second most used language by developers in 2019.

Python is one of the most popular languages in 21th century because it is so productive compare to other programming languages. It is easy to read, code or to understand because of its simple syntax.

WE NEED A PROGRAMMING language to write any kind of software. Without software it is not possible to run hard components.

1.1.1.1 Software

Software is a program or set of programs written by using programming languages.

Software is responsible for running hardware.

All operating systems are also software.

Operating system controls and runs all hardware.

BEFORE WE START A PYTHON Programming we must know what are basically Complier and Interpreted

When we write a code we know that it is executes with the help of the back-end system. This checking system is whether Interpreted or a Complier.

It translates the whole programme given to it into machine code (1s and 0s).

It takes large amount of time to analyse the high level code but the overall execution time is completely faster.

As it requires more memory than interpreter because it generates intermediate object code which further requires linking.

It generates the error message only after scanning the whole programme so debugging is comparatively hard.

Programming language like C, C++, Swift, Erlang uses compilers.

It translates one by one line of the whole programme into machine code.

It takes less amount of time to analyse the high level code (given by programmer also called source code) but the overall execution time is slower.

As they are memory efficient because no intermediate object code is generated in it.

It continues translating the programme until the first error is met, in that case it stops. So debugging is easy as we can find the bug easily.

Programming language like Python, Ruby, Perl, PHP use Interpreters.

PYTHON HAVE SOME RESERVED words also called keywords. They are special words acts as a programming instruction, defined with predefined meaning and syntax in the language. We cannot use them for variable or function. If you use any of them as a variable name it makes a syntax error so you should kept this thing in your mind that error may be generated because you are using one of these words.

The print function in Python prints all the given statement inside the parentheses to the output console window. These input statements can be Integers, Strings or Float. This function is most widely used in the programs.

INTEGER IS A WHOLE number. To print that, we do not use quotation marks. We can write the code as follows,

WE CAN PRINT ANY STRING value as following,

Here we print the sting without quotes,

As 123 is integer but here it is written inside quotation () so it is not integer anymore but become a string.

THE WHOLE NUMBER WITH the decimal point called float value. Like in Integer, quotation mark is not essential but quotation marks treated it like string value.

We can see in the following block of code that there is space between the outputs as print function have default separator space. Separator tells us how two values will be separate.

Knowledge: You can change default separator by any value you want like,

Task: 1) Change default value of end to any other value.

(Hint: To see its effect use multiple print () functions)

2) \n is Escape character .Explore more escape character to learn more.