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Comparison Operators (C# and JavaScript Cross Reference Guide)

By Mike Prestwood

C# versus JavaScript: A side by side comparison between C# and JavaScript.

 
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.

C#:   ==, !=

Common comparison operators:

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

Syntax Example:
//Does C# evaluate the math correctly? No!
if (.1 + .1 + .1 == .3)
MessageBox.Show("correct");
else
MessageBox.Show("not correct");
JavaScript:   ==, !=

Common comparison operators:

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

Syntax Example:
//Does JavaScript evaluate the math correctly? No!
if (.1 + .1 + .1 == .3) {
document.write("correct");
}
else {
document.write("not correct");
}












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