A few words that can represent your words or reports or events. For example, a review question for a civil service exam can be found by searching for civil service exam questions, no matter what it is written. Find those keywords, you can find your things, and guessing is the role of keywords.
What are keywords?
Keywords come from English "keywords", which refer to the words used by a single media when making and using indexes. It is a vocabulary in library science. Keyword search is one of the main methods of online search index, and it is the expression of the specific name of products or services or companies known by visitors from the West Sea.
What do you mean by "keywords"?
The key word is the key word you want to express in this sentence ... For example, you want to search what medicine I take for a cold, cold medicine is the key word, and you want to browse some boxing tutorials, which are the key words.
What are the keywords in programming?
There are 32 keywords * * * in C language, which can be divided into four categories according to their functions: top data type keywords, control statement keywords, storage type keywords and other keywords. (1) data type keywords (12): char, double, enum, float, int, long, short, signed, struct, union, unsigned, void.
(2) Control sentence keywords (12): break, case, continue, default, do, else, for, goto, if, return, switch, while.
(3) storage type keywords (4): auto, extern, register, static.
(4) Other keywords (4): const, sizeof, typedef, volatile.
What do Taobao keywords mean?
That is, for example, if you want to search for "ladies' sweaters" in Taobao, all the baby titles will have "ladies' sweaters" instead of "men's sweaters"! Women's sweater is the key word!
What do keywords mean in C language?
The so-called keywords are words that have been used by the C language editing tool itself and cannot be used for other purposes.
Auto: Declaring automatic variables generally does not use performance.
Double: Declare a double-precision variable or function.
Int: Declare an integer variable or function.
Struct: Declare a structural variable or function.
Break: jump out of the current loop.
Else: Negative branch of conditional statement (used with if)
Long: Declare a long integer variable or function.
Switch: used to switch statements.
Case: switch statement branch
Enumeration: Declaring Enumeration Type
Registers: Declaring Accumulator Variable
Typedef: an alias used for data types (of course, there are other uses)
Char: Declare a character variable or function
Extern: The declared variable is being declared in another file (it can also be regarded as a reference variable).
Return: The subroutine returns a statement (with or without parameters).
Union: declare union data type.
Const: declare a read-only variable
Float: Declare a floating-point variable or function.
Short: Declare a short integer variable or function.
Unsigned: Declare an unsigned type variable or function.
Continue: End the current cycle and start the next cycle.
Agree: a circular statement (meaning beyond words)
Signed: Life has a signed type variable or function.
Void: Declare that a function has no return value or no parameters, and declare an untyped pointer (basically these three functions).
Default: "Other" branch in switch statement
Goto: unconditional jump statement
Sizeof: Calculate the data type length
Volatile: indicates that variables can be changed implicitly during program execution.
Do: the loop body of the loop statement
While: loop condition of loop statement
Static: declare a static variable.
If: conditional statement
What do keywords mean in C language?
Although main was not found in the keyword table
But the program will start with main as the entrance, so it cannot be defined.
Keywords in C language
Auto: Declaring automatic variables is not usually used.
Double: Declare a double-precision variable or function.
Int: Declare an integer variable or function.
Structure: declare a structural variable or function break: jump out of the current loop.
Else: Negative branch of conditional statement (used with if)
Long: Declare a long integer variable or function.
Switch: used to switch statements.
Case: switch statement branch
Enumeration: Declaring Enumeration Type
Registers: Declaring Accumulator Variable
Typedef: an alias used for data types (of course, there are other uses)
Char: Declare a character variable or function
Extern: The declared variable is being declared in another file (it can also be regarded as a reference variable).
Return: The subroutine returns the statement (with or without parameters).
Union: declare union data type.
Const: declare a read-only variable
Float: Declare a floating-point variable or function.
Short: Declare a short integer variable or function.
Unsigned: Declare an unsigned type variable or function.
Continue: End the current cycle and start the next cycle.
Agree: a circular statement (meaning beyond words)
Signed: Life has a signed type variable or function.
Void: Declare that a function has no return value or no parameters, and declare an untyped pointer (basically these three functions).
Default: "Other" branch in switch statement
Goto: unconditional jump statement
Sizeof: Calculate the data type length
Volatile: indicates that variables can be changed implicitly during program execution.
Do: the loop body of the loop statement
While: loop condition of loop statement
Static: declare a static variable.
If: conditional statement
The above are commonly used keywords, I hope to help you with your study.
What are the key words in the paper?
Keywords keywords are the words you enter in the search box, which is what you ordered the search engine to find.
You can order the search engine to find anything, so the content of keywords can be: name, website, news, novel, software, game, constellation, work, shopping, paper, etc.
Keyword can be any Chinese, English, numbers or mixed Chinese and English numbers.
For example, you can search [A Chinese Odyssey], [Windows], [9 1 1], [F- 1 racing car].
Keywords, you can enter one, two, three, four or even one sentence.
For example, you can search for [Love], [Beauty], [mp3 Download], [Introduction] and [Looking back suddenly, that person is in the dim light].
Entering multiple keywords can get more accurate and rich search results.
For example, in Baidu search engine search [Beijing temporary residence permit], you can find tens of thousands. While searching for [Beijing Temporary Residence Permit], you can only find web pages containing five consecutive words of "Beijing Temporary Residence Permit". Not only are there only a few hundred articles found, but the accuracy of the information is also much worse than the former.
Therefore, when the keywords you want to search are lengthy, it is suggested to break them down into several keywords to search, and the words are separated by spaces.
In most cases, if you enter two keywords to search, you will get good search results.
[Edit this paragraph] Keywords
Keywords are used to express the theme of literature, not only for scientific papers, but also for scientific reports and academic papers.
Thesis is the carrier of creative ideas in scientific research. Its primary task is to transmit scientific research information, and it also has the significance of cultural storage and accumulation. No matter from the perspective of transmitting information or storing information, the indexing of subject words or keywords will bring great convenience to the storage and retrieval of documents. Therefore, the National Bureau of Standards1September, 1983 13 issued the Rules for Subject Indexing of Documents (GB 3860-83 Document), which stipulated the rules for the selection, indexing and matching of subject words in document subject analysis. For more than ten years, most papers in natural science journals are accompanied by subject words or keywords, while liberal arts journals have just started to varying degrees. In my work, I found that the keyword indexing of many academic papers is not standardized, that is, inappropriate.
How to index keywords properly?
No matter the nouns directly extracted from the topic or some words extracted from the subheadings, texts or abstracts, we should mark a single concept to avoid compound concepts. Therefore, when selecting keywords, we must define the selected words or phrases. For example, in the article "Problems and Countermeasures in Law Enforcement of Grassroots Police", the key words of indexing are: "Law Enforcement Quality, Law Enforcement Image and Quality Education". This paper is indexed by three keywords, none of which is in the title or subtitle of the article. No one can see the image of law enforcement, the quality of law enforcement and who quality education is for without looking at the title and only looking at the keywords. Obviously, these three keywords are not specific, but compound concepts. If the "grassroots police" is indexed, it will be very clear. Grass-roots police, this is a phrase and a single concept. People will know at a glance that your article is about this part of grass-roots police. In addition, the two key words "law enforcement quality" and "law enforcement image" are somewhat similar in a sense, and quality can often reflect a person's image.
What do the keywords in the program mean? 5 points
Keyword is a word with special meaning designated by the inventor of the program, also called reserved word.
A keyword is a value used to identify a specific data item of each record in a file.
Keywords are predefined identifiers with special meanings in computer languages.
baike.baidu/...XMQ-#3