HOW TO USE CALCULATOR

3.8. Example tasks

Calculator for Chemists reads and calculates line by line, ignoring all that appears after the equal sign [=]. The lines which started with # are command lines. With these lines it is possible to change the number format or the angle measurement.

Here is the sample tasks divided in several categories:

	== Calculator for Chemists ==
	  August 18, 2012  11:28:29

	
= Basic calculations =

3+3 = 6

5+7+10+2 = 24

12+(20-8)*3+7 = 55

(8+3 = Missing right bracket ')'

12+20-8)*3+7 = Missing left bracket '('

2+2-9 = -5

0.5*0.6 = 0.3

2.5+2.12+-9*0.8 = -2.58

27/3 = 9

3*5*-7 = -105

9.12e-31*5 = 4.56e-030

9.12e3+5.1e-1 = 9120.51

5.48e-7/5.972e24 = 9.17615539182853e-032

2^3 = 8

2^3/0 = Cannot divide by zero!

8.12e-5/2 = 4.06e-005

8.12e5/2 = 406000

4+5-*-1 = Incorrect syntax

4+5-1*-7 = 16


= Calculate functions =

:sin1.5 = 0.997494986604054

:asin0.997494986604054 = 1.49999999999999

:cos-2 = -0.416146836547142

:tan5 = -3.38051500624658

:cot2 = -0.457657554360286

:sin(:pi/2) = 1

:cos:pi = -1

:log1000 = 3

:alog3 = 1000

5! = 120

:ran100 = 6

:int(3.45) = 3

:int(-3.45) = -3

:ln123 = 4.81218435537242

:log5.43e-8 = -7.26520017041115

:log(5-8) = Logarithm of a negative number

:log:abs(5-8) = 0.477121254719662

x^2+x = 0
x1 = 	-1
x2 = 	0

x^2+x-7 = 0
x1 = 	-3.19258240356725
x2 = 	2.19258240356725


= Calculate chemical formula =

H2SO4 = 98.07848

H2O = 18.01528

Cu(NO3)2 = 187.5558

CH3CH2COOH = 74.07854

ClCH2CH2COHCl = 127.9772

NaBiO3 = 279.96836928

hno3 = HNO3 = 63.01284

na2so4 = Na2SO4 = 142.04213856

CoAsO4 = 197.852395


wrco3 = WRcO3 = Unknown element symbol

CuSO4+5H20 = 260.4026


= Command and combine expressions =

5*20 = 100

#mem = 100

:log:mem = 2

#mem+ = 2

73.9/NaNO3 = 0.869466292721835

:mem*3 = 306

#mem- = 306

Pb(NO3)2+2H2O = 367.24036

Al(NO3)2+2H2O = 187.0218986

#fix3 = 187.022 = numbers rounded to three decimal places

[Cr(NO3)3]+9*(H2O) = 400.148

[Fe(NO3)3]+9*(H2O) = 403.997

#sci1 = 4.0e+002 = scientific mode with one decimal place

(Ni(NO3)2)+6*(H2O) = 2.9e+002

(Mn(NO3)2)+6*(H2O) = 2.9e+002

#auto = 287.039525 = return to automatic mode

(Ni(NO3)2)+6*(H2O) = 290.79488

(Mn(NO3)2)+6*(H2O) = 287.039525

:sin2 = 0.909297426825682

#fix3 = 0.909

:sin2 = 0.909

#deg = 0.909

:sin2 = 0.035

#sci5 = 3.48995e-002

#grad = 3.48995e-002

:sin2 = 3.14108e-002

#auto = 0.0314107590781283

#rad = 0.0314107590781283

Ca(NO3)2 = 164.0878

Sr(NO3)2 = 211.6298

104.4/(Mn(NO3)2+6H2O) = 0.363712976462039

NaF = 41.98817248

:intNaF = 41

:logNaF = 1.62312697253926


FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF = 1082.9089824

FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF = Expression is too long