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 ► KB ► Programming ► Delphi Prism ► Language Basics
From the April 2010 Issue of Prestwood eMag
 Prism Language Basics:Delphi Prism Comparison Operators (=, <>)
Posted 15 years ago on 1/18/2009
Prism Code Snippet:
 To/From Code Guide: Delphi Prism Compari... vs. Other Languages  A flashcard from our Prism Flashcards Library  A code snippet from our Prism Code Snippets Page

### 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: Comparison Operators

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 Comparison Operators

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");`

### More Info

 Tip: Round Floating Point Numbers

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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.

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