Back to the Basement Computing Page
 

Documentation
 

Index
 
ASCII Table
AudMat
AudSDK
Basement Blog
BC - Behaving Cat
COM Data Collection
COMA Data Analysis
Correcting GW for phone
CSF format
DAFLIB
Data Schemas
DCP - Introduction
DCP - Tech Notes
DCP - Users Guide
DCPLIB
DSS-III Notes
DSS-III Prototype
DSSLIB
DSS3LIB
DSS4LIB
DSS4FLIB
Effective SPL computation
EP - Evoked Potential
Error Codes
Falling Cost of Computing
FF - Free Field
Fortran and C/C++ mix
GWE - Waveform Editor
Local FAQs
Mathematical Formulae
Minicomps. & Neurophys.
MISLIB
Numerical Constants
NUMLIB
PIN - Edge/Notch
PIN - Summary
Probe Tube Correction
RA - Introduction
RA - Tech Notes
RA - Users Guide
RAP - Users Guide
Rayleigh Test
SER - Search Stimulus
SERCOM - COM Search
Signal Analysis Review
Simulating Free Space
STATPK - Introduction
STATPK - Tech Notes
STATPK - Users Guide
Status Table Formats
SysInfo
 
Disclaimer
 
Common Numerical Constants
Quick Links
Trig and Log
Factorials
Powers of 2
Feedback

Ravi Kochhar
Dept. of Physiology
University of Wisconsin - Madison
Oct. 30, 1997
rev. 1.01, Oct. 9, 2009
Technical Note no. 24

Common Numerical Constants

Believed to be accurate, but use at your own risk.

PI = 3.14159 26536 89793 23846 26433 83279 50288
2*PI = 6.28318 53071 79586 47692 52867 66559 00576
Log(PI) = 0.4971498727 (base 10 log)
Ln(PI) = 1.1447298858 (natural log)

e = 2.71828 18284 59045 23536 02874 71352 66250

SQRT(2) = 1.41421 35623 73095 04880 16887 24209 69808

1 radian = 57.29577 95131 degrees

Factorials!

       n             n!
       -             --
       1              1
       2              2
       3              6
       4             24
       5            120
       6            720
       7           5040
       8          40320
       9         362880
      10        3628800
      11       39916800
      12      479001600
      15     6227020800

Powers of 2

           2^n      n     2^(-n)
           ---      -     ------
             1      0     1.0
             2      1     0.5
             4      2     0.25
             8      3     0.125
            16      4     0.0625
            32      5     0.03125
            64      6     0.015625
           128      7     0.0078125
           256      8     0.00390625
           512      9     0.001953125
          1024     10     0.0009765625
          2048     11     0.00048828125
          4096     12     0.000244140625
          8192     13     0.0001220703125
         16384     14     0.00006103515625
         32768     15     0.000030517578125
         65536     16     0.0000152587890625
        131072     17
        262144     18
        524288     19
       1048576     20
       2097152     21
       4194304     22
       8388608     23
      16777216     24
      33554432     25
      67108864     26
     134217728     27
     268435456     28
     536870912     29
    1073741824     30
    2147483648     31
    4294967296     32
    8589934592     33
   17179869184     34
   34359738368     35
   68719476736     36
  137438953472     37
  274877906944     38
  549755813888     39
 1099511627776     40
 2188023255552     41
 4398046511104     42

Back to Top

Feedback

Please send feedback/suggestions/questions/complaints to the author via email, at kochhar@physiology.wisc.edu

(This page last modified on Oct. 9, 2009)

 
Back to Top
Back to The Basement Computing Page
Back to The Basement

Please send questions, complaints or comments to rkochhar@wisc.edu