Difference between keyword and identifier

Main difference

The keyword, for computer languages, is defined as a predefined word that is reserved for work programs that have a special meaning and cannot be used anywhere else. The identifier, for computer languages, is defined as the values ​​used to define different programming elements, such as variables, integers, structures, unions and others, and are mostly alphabetic in character.

Comparison chart

Basis of Distinction Keyword identifier
Definition A predefined word that is reserved for job programs that have a special meaning and cannot be used anywhere else. the values ​​that are used to define different programming elements such as variables, integers, structures, unions and others and are mostly alphabetical.
Nature They are already added within a programming language, and cannot be defined as variables by the user as they produce an error. They have a broader role where they are used as variables, interfaces, and even classes and packages.
Purpose They help identify a specific property that exists within a computer language. They help locate the name of the entity that is defined along with a keyword.

Keyword

The keyword, for computer languages, is defined as a predefined word that is reserved for work programs that have a special meaning and cannot be used anywhere else. Keyphrases are preset and saved words used as part of programming that have extraordinary meaning. Keywords are a part of the sentence structure and cannot be used as an identifier. Keywords are standard identifiers that have a default standard meaning in C. They are all lowercase, since uppercase and lowercase characters are not the same, it is possible to use an uppercase keyword as an identifier, however it is not a term conventional programming. These terms are used for the intended reason only. They cannot be used as characterized identifiers by software engineers. Keywords cannot be used as factor names. A strongly related and regularly mixed thought is a catchphrase that is a word with extraordinary meaning in a particular setting. By differentiation, names in a standard library, however, not incorporated with the dialect are not considered retained words or catchwords. The expressions “saved the word” and “slogan” are often used in reverse – one can say that the attached name is “saved to use as a catchphrase” – and the formal usage fluctuates from dialect to dialect; for this article, we take the terms as shown. However, these two types of words do not require any coincidence,

identifier

The identifier, for computer languages, is defined as the values ​​used to define different programming elements, such as variables, integers, structures, unions and others, and are mostly alphabetic in character. Identifiers are names of elements in a C program, for example, factors, displays, capabilities, structures, unions, and flags. An identifier can be made with only uppercase lowercase letters, underscores, and digits, but must begin with only a message in order or an underscore. If the identifier is not used as part of an external connection, it is called internal. Illustration: Local variable. In case the identifier is used as part of an external connection identifier, then it is called external. An identifier is a string of alphanumeric characters beginning with an alphabetic character or an underscore character that are used to talk to different programming components, for example factors, capabilities, exhibits, structures, joins, etc. An identifier is a word characterized by the client. There are 53 characters, to talk about identifiers. There are 52 alphabetic characters and the underscore character. The underscore character considered as a letter in identifiers. The underscore character is typically used as part of the center of an identifier. The main character of an identifier must be a set of letters or an underscore and can follow any numeric letter in order, or digits or underscores. They must not start with a number. In addition, uppercase and lowercase letters are unmistakable. Namely,

Key differences

  1. The keyword, for computer languages, is defined as a predefined word that is reserved for work programs that have a special meaning and cannot be used anywhere else. The identifier, for computer languages, is defined as the values ​​used to establish different programming elements, such as variables, integers, structures, unions and others, and are mostly alphabetic.
  2. Keywords are already added within a programming language and cannot be defined as variables by the user as they produce an error. On the other hand, identifiers have a broader role where they are used as variables, interfaces, and even classes and packages.
  3. The number of keywords within the C programming language is rated at 52, on the other hand, the number of identifiers can become unlimited as anyone can use any word according to the requirement and includes even inger and other values.
  4. Keywords help identify a particular property that exists within a computer language. On the other hand, identifiers help to locate the name of the entity that is defined together with a keyword.
  5. For a keyword, letters are always lowercase in nature and uppercase becomes useless. On the other hand, identifiers can include lowercase, uppercase, and even numbers for use.

Related Articles

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button