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   ► KBTo/From GuidesVB ClassicStatements  Print This     

Comparison Operators (Cross Ref > Statements)

By Mike Prestwood

VB Classic versus C++/CLI: A side by side comparison between VB Classic and C++/CLI.

 
Operators
 

A language symbol used for assignment, comparison, computational, or as a logical.

Comparison Operators

[Other Languages] 

General Info: Round Floating Point Numbers

When comparing floating point numbers, make sure you round to an acceptable level of rounding for the type of application you are using.

Languages Focus

A comparison operator compares two values either literals as in "Hello" and 3 or variables as in X and Counter. Most languages use the same operators for comparing both numbers and strings. Perl, for example, uses separate sets of comparison operators for numbers and strings.

VB Classic:   =, <>

Common comparison operators:

= equal
<> not equal
< less than
> greater than
<= less than or equal
>= greater than or equal
Syntax Example:
//Does VB evaluate the math correctly? No!
If 0.1 + 0.1 + 0.1 = 0.3 Then
MsgBox "correct"
Else
MsgBox "not correct"
End If
C++/CLI:   ==, !=

Same as standard C++. Common comparison operators:

== equal
!= not equal
< less than
> greater than
<= less than or equal
>= greater than or equal
Syntax Example:
//Does C++/CLI evaluate the math correctly? No!
if (0.1 + 0.1 + 0.1 == 0.3)
MessageBox::Show("correct");
else
MessageBox::Show("not correct");












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