Shop Solver

The Expression Evaluator

Every numeric entry field in Shop Solver has a built-in expression evaluator.  It's like having a scientific calculator in every entry field.  Expressions are evaluated when the entry field loses the focus by tabbing to or clicking on something else.  Note:  If an invalid expression is entered into a numeric entry field, such as trying to divide by zero, the field's background will turn red to let you know an error has occurred.


The following arithmetic operators are supported:

+
Addition.  Example: 1.2+3.4 = 4.6

-
Subtraction and negation.  Example:    -1.2-3.4 = -4.6

*
Multiplication.  Example:  1.2*3.4 = 4.08

/
Division.  Example:  1.2/3.4 = 0.3529

(  and  )
Grouping.  Example:  (1+2)*3 = 9

%
Modulus.  Computes the remainder after dividing the first operand by the second.  Example:  5%2 = 1

^
Power/Exponentiation.  Returns the value of the first operand raised to the power of the second.  Example:  3^4 = 81


The following functions are supported.  Click on a function's link to see its description.

abs
acos
asin
atan
atan2
cbrt
ceil
cos
cosh
exp
floor
hypot
log
log10
max
min
quad
random
round
sin
sinh
sqrt
tan
tanh
todd
todegrees
todms
toinch
tomm
toradians
torpm
tosfm
truepos


abs
Returns the absolute value of a number.  Example:  abs(-3.2) = 3.2

acos
Returns the angle in degrees whose cosine is the specified number.  Example:  acos(.866) = 30.0029

asin
Returns the angle in degrees whose sine is the specified number.  Example:  asin(.5) = 30

atan
Returns the angle in degrees whose tangent is the specified number.  Example:  atan(1) = 45

atan2
Returns the angle in degrees whose tangent is the quotient of two specified numbers.   Usage:  atan2(y,x)  Example: atan2(.5,.866) = 30.0007  Note:  The example can also be entered as atan(.5/.866)

cbrt
Returns the cube root of a number.  Example:  cbrt(8) = 2

ceil

Returns the smallest integer greater than or equal to the specified number.

 Example:  ceil(5.3) = 6

cos
Returns the cosine of the specified angle.  Example:  cos(60) = .5

cosh
Returns the hyperbolic cosine of the specified angle.   Example:  cosh(4.9) = 67.1486

exp
Returns e raised to the specified power.  Example: exp(4.9) = 134.2898

floor

Returns the largest integer less than or equal to the specified number.  Example:  floor(5.3) = 5

hypot
Returns the square root of the squares of the two operands.  Example:  hypot(3,4) = 5

log
Returns the natural (base e) logarithm of a specified number.  Example:  log(1.2) = .1823

log10
Returns the base 10 logarithm of a specified number.  Example:  log10(1.2) = 0.0792

max
Returns the larger of the two operands.  Example:  max(3,2) = 3

min
Returns the smaller of the two operands.  Example:  min(3,2) = 2

quad
Returns a solution of the quadratic equation.  Usages:  quad(plus,a,b,c) and quad(minus,a,b,c) where "plus" and "minus" denote whether the operands in the numerator of the equation below should be added ("plus") or subtracted ("minus").  Example:  quad(plus,3,5,1) = -0.2324

                            ________
            -b   +/-   \/ b^2 - 4ac
    y = -----------------------------
                       2a


random
Returns a random number between 0 and 1.  Usage:  random()

round
Returns a specfied number rounded to the nearest integer.  Examples:  round(3.4) = 3  and  round(3.5) = 4

sin
Returns the sine of the specified angle.  Example:  sin(60) = 0.866

sinh
Returns the hyperbolic sine of the specified angle.  Example:  sinh(4.9) = 67.1412

sqrt
Returns the square root of the specified number.  Example:  sqrt(7) = 2.6458

tan
Returns the tangent of the specified angle.  Example:  tan(45) = 1

tanh
Returns the hyperbolic tangent of the specified angle.  Example:  tanh(4.9) = 0.9999

todd
Converts angles in the form of Degrees, Minutes, Seconds to decimal degrees.  Example: todd(30,15,50) = 30.263888889

todms
Converts angles in decimal degrees to Degrees, Minutes, Seconds.  The returned value is a whole number in the form "ddmmss".  Example: todms(30.263888889) = 301550

todegrees
Converts an angle specified in radians to degrees.  Example:  todegrees(0.5236) = 30.0001

toinch
Converts a length specified in millimeters to inches.  Example:  toinch(25.4) = 1

tomm
Converts a length specified in inches to millimeters.  Example:  tomm(1) = 25.4

toradians
Converts an angle specified in degrees to radians.  Example:  toradians(30) = 0.5236

torpm
Converts surface footage per minute (SFM) at a specified diameter to revolutions per minute (RPM).  Usage:  torpm(SFM,diameter)  Example:  torpm(500,.5) = 3820

tosfm
Converts revolutions per minute (RPM) at a specified diameter to surface footage per minute (SFM).  Usage:  tosfm(RPM,diameter)  Example:  tosfm(3820,.5) = 500

truepos
Returns the true position of two operands that specify X and Y variations in distance.  Usage:  truepos(X,Y)  Example:  truepos(.0015,.003) = 0.0067