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Comparison Operators (Cross Ref > Language Details)

By Mike Prestwood

Corel Paradox versus C++: A side by side comparison between Corel Paradox and C++.

 
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.

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
C++:   ==, !=

Common comparison operators:

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

Syntax Example:
//C++Builder example (ShowMessage is a VCL method).
//Does C++Builder evaluate the math correctly? No!
If (.1 + .1 + .1 == .3)
ShowMessage("correct");
else
ShowMessage("not correct");












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