IT SOLUTIONS
Your full service technology partner! 
-Collapse +Expand
VB.Net
Search VB.Net Group:

Advanced
-Collapse +Expand VB.Net To/From
To/FromCODEGuides
-Collapse +Expand VB.Net Store
PRESTWOODSTORE

Prestwood eMagazine

October Edition
Subscribe now! It's Free!
Enter your email:

   ► KBProgrammingVB.NetTool Basics   Print This    All Groups  
  From the July 2009 Issue of Prestwood eMag
 
VB.Net Tool Basics:
VB.Net Literals (quote)
 
Posted 13 years ago on 11/4/2008 and updated 1/18/2009
VB.Net Code Snippet:
 A flashcard from our VB.Net Flashcards Library
 A code snippet from our VB.Net Code Snippets Page
 Tags: VB.Net , Literals

KB101531

General Info: Programming Literals

A value directly written into the source code of a computer program (as opposed to an identifier like a variable or constant). Literals cannot be changed. Common types of literals include string literals, floating point literals, integer literals, and hexidemal literals. Literal strings are usually either quoted (") or use an apostrophe (') which is often referred to as a single quote. Sometimes quotes are inaccurately referred to as double quotes.

Languages Focus: Literals

In addition to understanding whether to use a quote or apostrophe for string literals, you also want to know how to specify and work with other types of literals including floating point literals. Some compilers allow leading and trailing decimals (.1 + .1), while some require a leading or trailing 0 as in (0.1 + 0.1). Also, because floating point literals are difficult for compilers to represent accurately, you need to understand how the compiler handles them and how to use rounding and trimming commands correctly for the nature of the project your are coding.

VB.Net Literals

String literals are quoted as in "Prestwood". If you need to embed a quote use two quotes in a row.

To specify a floating point literal between 1 and -1, preceed the decimal with a 0. If you don't, the compiler will auto-correct your code and place a leading 0. It will change .1 to 0.1 automatically. Trailing decimals are not allowed.

Syntax Example:
Console.WriteLine("Hello")
Console.WriteLine("Hello ""Mike"".")
  
'Does VB.Net evaluate this simple
'floating point math correctly? No! 
If (.1 + .1 + .1) = 0.3 Then
MsgBox "Correct"
Else
MsgBox "Not correct"
End If

More Info

Definition:  Programming Literals

Comments

0 Comments.
Share a thought or comment...
 
Write a Comment...
...
Sign in...

If you are a member, Sign In. Or, you can Create a Free account now.


Anonymous Post (text-only, no HTML):

Enter your name and security key.

Your Name:
Security key = P1156A1
Enter key:
Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains play-drums.com and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

Visit Profile


Linked Certification Question(s)

The following are practice certification questions with answers highlighted. These questions were prepared by Mike Prestwood and are intended to stress an important aspect of this KB post. All our practice questions are intended to prepare you generally for passing any certification test as well as prepare you for professional work.

Beginner

1 Beginner Level Question

Question #1: Multiple Choice

Which of the following code statements correctly embeds a quoted string within a quoted string?

Answer:
1. 
MessageBox.Show("Hi \"Brian\".")
2. 
MessageBox.Show('Hi "Brian".')
3. 
MessageBox.Show("Hi ""Brian"".")
4. 
MessageBox.Show("Hi \qBrian\q.")
5. 

All of the above.


 KB Article #101531 Counter
11439
Since 11/4/2008
Go ahead!   Use Us! Call: 916-726-5675  Or visit our new sales site: 
www.prestwood.com


©1995-2021 Prestwood IT Solutions.   [Security & Privacy]