MathU RPN Quick Reference

MathU RPN 2.2
Preferences
Basic Functions
Copy and Paste
Stack And Register Functions
Financial Functions
Scientific Functions
Trigonometric Functions
Date and Time Functions
Polar Conversions
Number Base Functions
Statistics Functions

DigitsNumber of decimal digits
FormatFixed, scientific or engineering
Number baseDecimal, hexadecimal, octal or binary
AnglesAngle domain for trigonometric functions
Payments dueat beginning or end of period. Affects N,i,PV,PMT and FV
WordsizeNumber of bits in HEX, OCT, BIN mode
Stack HeightNumber of registers in stack
Date formatM.DY or D.MY
Button ClicksTurns on or off button click sounds
Show more stackDisplay two stack lines (on) or just the X stack register (off)

0 − 9used to enter numeric values,.
A − Fused to enter hexadecimal numerals
CHSChange sign
EEXStart entering exponent
←Undo
−Minus
+Plus
×Multiply
÷Divide
ENTERSeparate values and push X register

MathU RPN supports copying and pasting numbers from other applications on the iPhone and iPod touch. To copy the value currently displayed, double tap the display and then select "Copy" from the menu that pops up.

Copy and Paste

To paste a value into the display that was copied from another application, double tap the display and choose "Paste". If "Paste" is not available, it means that the system pasteboard does not contain a number recoginizable to MathU RPN.

STO nStore into register n
STO . nStore into register n+10
STO fnStore into financial register (N, i, PMT, PV, FV)
STO + nAdd X to register n or n+10
STO − nSubtract X from register n or n+10
STO × nMultiply X times register n or n+10
STO ÷ nDivide X from register n or n+10
RCL nRecall register n
RCL . nRecall register n+10
RCL fnRecall financial register (N, i, PMT, PV, FV)
RCL CF0Recall cash flow 0
RCL CFjRecall cash flow j and decrement N
RCL NjRecall cash flow count j
RCL Σ+Recall statistics sums
CLREGClear all registers
x<>yExchange X and Y registers
LST XRecall last X value
CLXClear X register
CLSTKClear stack
R↑Rotate stack contents up
R↓Rotate stack contents down
ENTERSeparate values and push X register
←Undo last character (or clear X register)

ff shift
gg shift
MODModulo (y - x * floor(y/x))
πValue of pi
LNNatural logarithm (base e)
LOGBase 10 logarithm
e^xExponential function
10^xTen to the x power
y^xy to the power of x
x²Square
√xSquare root
1/xReciprocal
FRACFractional part
INTInteger part
MODModulo remainder (y - x * floor(y/x))
N!Factorial (Gamma function)
%Percent (y * x) / 100
%CHPercent change 100 * (x - y) / y
%TPercent of total 100 * x / y

SINSine
COSCosine
TANTangent
COS⁻¹Arccosine
SIN⁻¹Arcsine
TAN⁻¹Arctangent
πValue of pi (3.14159...)
→DEGRadians to degrees conversion
→RADDegrees to radians conversion
DEG indicatorAngles computed in degrees
RAD indicatorAngles computed in radians
GRD indicatorAngles computed in grads

DATEDate x days in the future from date y (in M.DY or D.MY). Day of week displayed in exponent interpreted as 1=Monday,7=Sunday
ΔDYSNumber of days between dates x and y
H.MSConverts from fractional hours to H.MS format.
HOURConverts from H.MS format to fractional hours.
H.MS formatTimes entered as HH.MMSS with fractional seconds following
M.DY preferenceDates entered as MM.DDYYYY
D.MY preferenceDates entered as DD.MMYYYY

R→PRectangular to polar coordinates
P→RPolar to rectangular coordinates

HEXHexadecimal number base mode
OCTOctal number base mode
BINBinary number base mode
DECDecimal number base mode
ANDBitwise AND of x and y
#BITSNumber of bits in x
ORBitwise OR of x and y
XORBitwise exclusive OR of x and y
NOTBitwise NOT of x
SHLBitwise left shift of y by x bits
SHRBitwise right shift of y by x bits
ASRBitwise arithmetic right shift of y by x bits
MASKLLeft justified bit mask with x bits
MASLRRight justified bit mask with x bits
RANDRandom integer (HEX, OCT or BIN mode) or random number (DEC mode)
CHSTwo's complement
+Modular addition (non-decimal bases)
−Modular subtraction (non-decimal bases)
ΧModular multiplication (non-decimal bases)
÷Modular division (non-decimal bases)

NStore/compute number of periods
12xMultiply by 12 and store as number of periods
iStore/compute interest rate per period
12÷Divide by 12 and store as interest rate
PMTStore/compute payment per period
PVStore/compute present value
FVStore/compute future value (balloon payment)
CLFINClear financial registers
BEG indicatorPayment due at beginning of period
END indicatorPayment due at end of period
AMORTInterest and principal for an amortization of x payments.
CF0Define initial cash flow.
CFjDefine cash flow j.
NjDefine count for cash flow j. Count is 1 if not set.
IRRInternal rate of return of the stored cash flows
NPVNet present value of the stored cash flows for discount rate i
RCL CF0Recall cash flow 0
RCL CFjRecall cash flow j and decrement N
RCL NjRecall cash flow count j

Σ+Accumulate x,y
Σ−Remove x,y
RCL Σ+Recall Σx and Σy into x and y
Mean
σStandard deviation
y,rFind y and correlation coefficient given x (linear fit)
x,rFind x and correlation coefficient given y (linear fit)
N!Factorial (Gamma function)
RANDUniform random number between 0 and 1 (DEC mode) or random integer (HEX, OCT or BIN mode)
%Percent (y * x) / 100
%CHPercent change 100 * (x - y) / y
%TPercent of total 100 * x / y
CL ΣClear statistical registers

MathU RPN 2.2