there are various types of naming rule provide for function ,identifier,i.e variables.but naming rule for variable must meet certain condition..
1.you can easily idenfy what is variable for.for eg.you may use
int a;/to store no of student in your prog. but it is better instead of using "a",you can write any of the following definition
int stu; or int stu_no; or int studentno;
2.it must be abbreviated.because although modern compiler support 32 char variable but still where you use that variable you have to type that name again &again.
so for eg. in the above case int stu_no; is optimal.
when these precondition are met then here are some rules for naming a variable:
1.you use only English alphabet,numeric no,& _(underscore).
2.you must start with a alphabet. then you continue with alphabet or numeric or under score.for eg. you can define a variable like
int stu_comp_2009;//for no of student 2009 batch.
3.no variable can start with number or _.such naming may cause some compiler do the right job but maximum would not support this.
XML has no rules like html in regards to tags and naming tags, you write your own xml tags.
Without variables, you won't be able to do much programming. Variables is where you store data; such data may change over time. And computer programming is all about manipulating data.
HTML is not a programming language and as such does not allow you to declare variables.
a variable should in a programming because as the definition implies it is a named location in the memory where all the data is to be stored
The naming convention for variables, constants, classes, and methods involves delimiting separate words with a non-alphanumeric character such as a hyphen or underscore.
In computer programming, variables refer to a particular location in the memory that holds a value. Variables are equivalent to their assigned values.
Classes in programming are typically named using a naming convention called UpperCamelCase, where each word in the class name starts with an uppercase letter. This format helps differentiate class names from variables and functions.
The IUPAC rules for naming new chemical elements are at this link.
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Coding manuals, also known as programming standards manuals, are used to define the standards associated with programming in a particular environment. A coding manual will provide standards for: * Variable Naming * Subroutine/Function Naming * Comments * Nesting (e.g., how to reflect loops, if statements, etc.) * Structure (e.g., where global variables are defined, etc.) * Code Reviews and other standards that might be specific to a particular programming environment.
Upper & Lower case letters are the naming rules on Microsoft Word 2007.
In programming, the term "prefix" typically refers to a naming convention that precedes the name of a variable. Common prefixes include "int" for integer variables, "str" for string variables, "bool" for boolean variables, and so on. These prefixes help developers quickly identify the data type of a variable.
XML has no rules like html in regards to tags and naming tags, you write your own xml tags.
A linear programming question with two variables. Problems with three can be solved if there is a constraint that reduces them to effectively two variables. Linear programming with 3 variables, using 3-d graphs is possible but not recommended.
Variables are placeholders for values. They can change or vary. In programming, they store data.
In programming languages, variables are used to store data values, while pointers are variables that store memory addresses of other variables. Variables directly hold data, while pointers hold the location of where data is stored in memory.
Without variables, you won't be able to do much programming. Variables is where you store data; such data may change over time. And computer programming is all about manipulating data.