Comparison Operators (Cross Ref > Language Details)

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");