D Documentation  
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  1. Introduction
    1. A simple tutorial
    2. Switching to D
    3. An advanced tutorial
  2. Language Reference
    1. General syntax
    2. Statements
    3. Types
    4. Error Handling
    5. Memory Management
  3. Std. runtime library (Phobos)
    1. std.base64
    2. std.boxer
    3. std.compiler
    4. std.conv
    5. std.ctype
    6. std.date
    7. std.file
    8. std.format
    9. std.gc
    10. std.intrinsic
    11. std.math
      1. * Constants
      2. sin
      3. cos
      4. tan
      5. sinh
      6. cosh
      7. pow
      8. sqrt
      9. floor
      10. ceil
      11. isnan
      12. isinf
      13. isfinite
      14. frexp
      15. ldexp
      16. hypot
      17. copysign
      18. signbit
    12. std.md5
    13. std.mmfile
    14. std.outbuffer
    15. std.path
    16. std.process
    17. std.random
    18. std.recls
    19. std.regexp
    20. std.socket
    21. std.socketstream
    22. std.stdint
    23. std.stdio
    24. std.stream
    25. std.string
    26. std.system
    27. std.thread
    28. std.uri
    29. std.utf
    30. std.zip
    31. std.zlib
  4. Libraries and Tools
    1. mango
    2. Build
  5. Related Links
  6. About this documentation
* Constants
Math provides the following real type constants:

const real PI; // ~=3.14159265

const real LOG2; // Logarithmus of two. ~=0.301029995

const real LN2; // ~= 0.693147180

const real LN10; // ~= 2.3025
const real E; // ~= 2.718

const real SQRT2; // the same as sqrt(2);

const real SQRT1_2; // the same as sqrt(0.5);

const real PI_2; // PI*0.5
const real PI_4; // PI*0.25
const real M_1_PI ;
const real M_2_PI;

const real LOG2T;
const real LOG2E ;
const real LOG10E;

const real M_2_SQRTPI ;
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