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   ► KBTo/From GuidesDelphi Prism  Print This     

Comparison Operators (Delphi Prism and Corel Paradox Cross Reference Guide)

By Mike Prestwood

Delphi Prism versus Corel Paradox: A side by side comparison between Delphi Prism and Corel Paradox.

 
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.

Delphi Prism:   =, <>

Same as Delphi. Common comparison operators:

= equal
<> not equal
< less than
> greater than
<= less than or equal
>= greater than or equal
Syntax Example:
//Does Prism evaluate the math correctly? No!
//This is different than later versions of 
//Delphi that muse MaxSingle in math.pas.
If .1 + .1 + .1 = .3 Then
MessageBox.Show("correct")
Else
MessageBox.Show("not correct");
Corel Paradox:   =, <>

Common comparison operators:

= equal
<> not equal
< less than
> greater than
<= less than or equal
>= greater than or equal

Syntax Example:
'Does ObjectPAL evaluate the math correctly? No!
If .1 + .1 + .1 = .3 Then
msgInfo("", "correct")
Else
msgInfo("", "not correct")
endIf












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