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Posted 29 Jul 2005

Math Parser

, 25 Aug 2005 CPOL
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Solve mathematical equations


This is a parser which uses RegEx to solve mathematical expressions.

How To Use It?

MathParser.Parser p = new MathParser.Parser();
if( p.Evaluate( "-(5-10)^(-1)(3+2(cos(3Pi)+(2+ln(exp(1)))^3))" ) ) 
    Console.WriteLine( p.Result );
else Console.WriteLine( "Error." );


  • Functions
    • abs
    • acos
    • asin
    • atan
    • cos
    • cosh
    • floor
    • ln
    • log
    • sign
    • sin
    • sinh
    • sqrt
    • tan
    • tanh
  • Operators: +, -, *, , ^, !
  • Constants: Pi

Choose between RAD, DEG and GRAD.

p.Mode = MathParser.Mode.RAD;
p.Mode = MathParser.Mode.DEG;
p.Mode = MathParser.Mode.GRAD;


Parser p = new Parser( MathParser.Mode.DEG );

2(1+3(1e3+1)) = 2*(1+3*(1000+1)) = 2*(1+3(1000+1)) = 2(1+3*(10^3+1)) = 6008

2(1+4(5Pi+2,2e3)(5+2)^3) is the same as 2*(1+4*(5*Pi+2200)*(5+2)^3).

Known Problems

I tested this parser on a German operating system (WinXP).
If I want to convert a string to double (e.g. "3.123") the decimal point must be a "," (Convert.ToDouble("3.123") would throw an Exception).
I'm not sure if this works on an English version of WinXP.

If there are any problems with the decimal point, just report it and I will fix it.

Bug Fixes

  • Fixed some problems with exponents


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Germany Germany
No Biography provided

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Comments and Discussions

GeneralIgnoring comma when called by SQL Assembly Pin
Leo Kruz25-Nov-09 3:59
memberLeo Kruz25-Nov-09 3:59 
GeneralThe Parser does not respect presedence Pin
her´minator4-Mar-09 21:20
memberher´minator4-Mar-09 21:20 
General(exp(2)) not working Pin
TominatorBelgium3-Mar-09 7:59
memberTominatorBelgium3-Mar-09 7:59 
Generalcos(8) Pin
bey0nd8512-Jan-09 0:08
memberbey0nd8512-Jan-09 0:08 
Question10*20+5*10 - No Result ? Pin
Victor Vanchesa15-Nov-07 12:42
memberVictor Vanchesa15-Nov-07 12:42 
Generalgift:binary/hexadecimal and a bug... Pin
METRAWARE5-Nov-07 7:45
memberMETRAWARE5-Nov-07 7:45 
GeneralRe: gift:binary/hexadecimal and a bug... Pin
error_50528-Aug-13 4:25
membererror_50528-Aug-13 4:25 
GeneralProblem with expression Pin
Avrin174-Oct-07 1:12
memberAvrin174-Oct-07 1:12 
GeneralRe: Problem with expression Pin
Member 773069617-Aug-11 17:24
memberMember 773069617-Aug-11 17:24 
Questionln(exp(1)) evaluating correctly for you? Pin
BreakableC21-Sep-07 2:13
memberBreakableC21-Sep-07 2:13 

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