## Explain purpose of relational operators and logical operator

by Dinesh Thakur Category: Variables and Constants

Relational operators: Relational operators are used for comparison of to variables of same data type. These operators are used in the conditions where two values are compared and true or false is returned according to test result.

## Variable’s Scope and Lifetime of a Variable

by Dinesh Thakur Category: Variables and Constants

A Variable’s Scope : The scope of a variable is the section of the application that can see and manipulate the variable. If a variable is declared within a procedure, only the code in the specific procedure has access to that variable. When the variable’s scope is limited to a procedure it’s called local.

## What is Purpose of the Val Function

by Dinesh Thakur Category: Variables and Constants

1. Visual Basic provides number of built in functions. The Val function is one of it. Val function converts the text data into a numeric value.

## Explain Order of Precedence of Operators for Calculations

by Dinesh Thakur Category: Variables and Constants

1. The order in which operator are performed determines the result. Consider the expressions 3 + 4 * 2. Over here if addition is done first, the result is 14. However, if multiplication is done first then result is 11.

## How variables are declared in Visual Basic

by Dinesh Thakur Category: Variables and Constants

Variables are used to store values during a program’s execution. So, variables are place values in which you can leave values and recall them at will.

## What effect does the location of a Dim statement has on the variables is declares

by Dinesh Thakur Category: Variables and Constants

1. There are several ways of declaring the variable, the most commonly used statement is Dim statement to declare the variable. The syntax for declaring the variable using Dim is as follows:

## Explain Boolean variable test for True and False. Give example

by Dinesh Thakur Category: Variables and Constants

In Visual Basic there are some controls properties that return you a Boolean value which can be as condition in the testing. For example, option buttons returns true when they are selected and returns you false when they are not.

## What is the general format of the statement used decisions in an application

by Dinesh Thakur Category: Variables and Constants

1. A power full asset of the computer is its ability to make decisions and to take alternate course of action based on the out come.

## What are Constants

by Dinesh Thakur Category: Variables and Constants

Some variables don’t change value during the execution of program. These are constants that appear many times in your code. The constants are preferred for two reasons :

## What is the Continuation operator ? When is it used

by Dinesh Thakur Category: Variables and Constants

When a Basic statement become too long for one line , use a line-Continuation

character.You can type a space and an underscore , press Enter, and continue the statement on the next line . It is OK to indent the continued lines.The only restriction is that the line-continuation character must appear between elements; you cannot place a continuation in the middle of a literal or split the name of an object or property.

Dinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.

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