initial value of sum = 0 # Sets the initial value of a total number to store the calculated result of the total number while count 3. All the even numbers in the output 1-100For I in Range (1,101): If I% 2 = = 0: print (i)4. All the odd numbers in the output 1-100For I in Range (1,101): If I% 2! = 0: print (i)5, to seek the 1-2+3-4+5-6...99 of all the number andMethod One:Count = 1sum = 0while Count Method Two:sum = 0for i in range (1,100): if I% 2 = = 0: sum = s
-bit machine, the number of integers is 32 bits and the value range is -2**31~2**31-1, which is -2147483648~2147483647On a 64-bit system, the number of integers is 64 bits and the value range is -2**63~2**63-1, which is -9223372036854775808~92233720368547758073) Float (floating point, float type)3.23 and 52.3E-4 are examples of floating-point numbers.The e tag represents a power of 10. Here, 52.3E-4 means 52.3 * 10-4.A floating-point number is used to process real numbers, which are numbers with
Write by nine days Yan Ling (jtianling) -- blog.csdn.net/vagrxie
Discuss newsgroups and documents
I implemented "onekeycodehighlighter"Some minor issues encountered in, you need to implement global shortcuts, but in fact QT does not provide support for global shortcuts, so QT can only be used through WIN32API, and I, it uses pyqt and python to call Win32 APIs. In fact, there is no difficulty.
Because of the popularity of
. Before Python 2.2, objects of the standard integer type exceeded the value range (for example, the number greater than 232 mentioned above), but since Python2.2 there will be no such errors.
The code is as follows:
>>> 9999 ** 8Traceback (most recent call last ):File"
", Line 1, in?
OverflowError: integer exponentiation
Python 1, 2.2
>>> 9999 ** 8
99920027994400699944002799920001L
Dou
[Learn python with me] Start from Python and start from python
In other words, the high-rise buildings on the ground will not climb before they go. This is especially true for me. No matter how you code first, please test first when the wings of me are hard.
1. How to Run python?
Download the
Python automated development (5): Introduction to Python, Python encoding, receiving and execution parameters, analysis of string principles, and python Encoding
Python automated development (5): Python introduction,
Python Study Notes-Day1-Python basics, python-day1-python1. Translation of advanced languages into machine languages: Interpretation and compilation
Python is an interpreted language.
1.1 syntax common three error types
Syntax error (syntax errors)Running error (runtime errors)Semantic Error (semantic errors)
1.3 vari
to long integers if an integer overflows, so it does not cause any serious consequences if you do not add the letter L after long integer Data.Float (float Type)A floating-point number is used to process real numbers, which are numbers with Decimals. Similar to the double type in c, accounting for 8 bytes (64 bits), where 52 bits represent the bottom, 11 bits represent the exponent, and the remaining one represents the Symbol.Complex (plural)The comp
Original link: http://www.kuqin.com/shuoit/20140728/341451.html
Many Python beginners want to know which version of Python they should start learning from. My answer to this question is "you learn the version of the tutorial you like and then check the differences between them." "
But what if you start a new project and have a choice? I would like to say that there is no right or wrong
Basic data typesOne, integersuch as: 18, 73, 84Each integer has the following functionsint (integral type)On a 32-bit machine, the number of integers is 32 bits and the value range is -2**31~2**31-1, which is -2147483648~2147483647On a 64-bit system, the number of integers is 64 bits and the value range is -2**63~2**63-1, which is -9223372036854775808~9223372036854775807Second, long integer typePossible such as: 2147483649, 9223372036854775807Each long integral type has the following functions:L
Python this thing seems to be very useful, but I don't know why it's been so hot.It is possible that this thing is too difficult to read ~ Read what, send God. Poor English people, the first look at the wrong, but also often misspelled, hehe!But it's a good thing to say.First, the configuration of the Python development environment1, first open the Python's official website https://www.python.org/downloads/
Python basic learning notes (Python environment) and python learning notes
Python first. Summarize the basic knowledge of Python.
I. Understanding Python
First, we need to know that the Python
, Python automatically converts integer data to long integers if an integer overflows, so it does not cause any serious consequences if you do not add the letter L after long integer data.Float (float type) First Literacy http://www.cnblogs.com/alex3714/articles/5895848.htmlA floating-point number is used to process real numbers, which are numbers with decimals. Similar to the double type in C, accounting for 8 bytes (64 bits), where 52 bits represen
represent the exponent, and the remaining one represents the symbol.Complex (plural)The complex number consists of real and imaginary parts, the general form is X+yj, where x is the real part of the complex, and Y is the imaginary part of the complex, where x and y are real numbers. Note: Small number pools exist in Python:-5 ~ 257 2, Boolean true or False 1 or 03, string string commonly used functions:
Python is a easy to learn, powerful programming language. It has efficient high-level data structures and a simple but effective approach to object-oriented programming. Python ' s ElegantSyntax and dynamic typing, together with its interpreted nature, make it a ideal language for scripting and rapid Application development in many areas on the most platforms. Python
Python exp () function
Describe
The exp () function returns the exponent of X,
Grammar
Import Mathmath.exp (x)
NOTE: exp () is not directly accessible, it needs to be imported into the math module and called by a static object.
Parameters
X-Numeric expression
return value
Returns the exponent of X
Instance
#-*-Coding:utf-8-*-import Math # import Math
BasisThe floating-point number is represented by the machine's double-precision (a-bit) of the floating-point number. provides approximately 17 bits of precision and ranges from 308 to 308 of the exponent. Same as the double type in the C language. Python does not support a single-precision floating-point number of 32bit. If your program requires precise control over intervals and digital precision, conside
Python isProgramming LanguageIts name comes from a comedy. Perhaps the people who initially designed the Python language did not expect that today python will be so widely used in industry and scientific research.
What is Python?(Reproduced from Primus)
Eric Raymond, the famous author of free softwareArticleIn "How
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.