Write the various rules to follow to declare variable in vb
Answers
Rules for naming variables in Visual Basic
Must be unique within scope
Must begin with a letter or the underscore _ character
May not contain embedded spaces or many special characters (. , “ - $ # * and others). The underscore _ is a valid character.
May not be a reserved word
In addition
Use upper and lower case with purpose. Once a variable is declared you do not have to be concerned with upper/lower case. The editor recognizes words that are the same except for case and makes them all the same for you. (use of upper and lower case differ between languages)
It is good programming practice in any language to use naming conventions (rules, standards) to name your variables. In Visual Basic the naming conventions include using a prefix that identifies the variable’s data type.
intNumber The prefix int would signify an integer variable
decHours The prefix dec would signify an Decimal variable, use sng for Single and use dbl for Double
strName The prefix str would signify a string variable
blnYearEnd The prefix bln would signify a Boolean variable
By default it is REQUIRED to declare variables before you use them. If you do not declare variables an error --- Name 'xxx' is not declared will be reported. However it is not syntactically required that you indicate a data type. In this class you must declare the data type when you declare the variable.
It is not a violation of the rules of the language to declare more than one variable on the same line