python--Computer Fundamentals

---------------------First Computer Foundation---------------------

1 What's the computer?

CPU------CPUs are used to calculate
Memory-----used to hold data (4G,8G,16G) data to be used immediately
Hard drive-----Store all the data
Input------Get data, return data

2 What is the operating system?------software that controls the underlying hardware

Used to control the data interaction between computer hardware

Windows
Linux

3 What is an application?

Qq
Excel
Browser (software)----software that obtains data through the operating system--

----------------------------Introduction to the second computer language---------------------------

----

Classification by execution efficiency:

--c language,------>>> runtime directly generate machine code----faster
--java,c#,python,php,----->>>> byte codes >>>>>> machine code-----Execute with bytecode---->> Regenerate machine code, slow execution

By explanatory type, compiled classification:

---c,java,c#---->>> compiled------>>>>> compile and execute faster
---python,php,--->>> Interpreting--->>>> real-time translation, compiling at the same time

Easy to learn by ease of use:

-----Python-----Class Library is powerful-----

-----C----->>> Language bias
-----C #--->>> Microsoft Development----Window System closed source
-----Java--->>> can be run on Windows,linux-------language type is multiple
----PHP---->>>> single Web
----JavaScript--->>>web directions and other Languages---page dynamic effects
----

-----Other Languages

python--Computer Fundamentals