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
floor 
real floor(real x)

Rounds x down.

Example:
writefln("floor(2.3)    is %d",cast(int)floor(2.3));
writefln("ceil(3.2)    is %d",cast(int)ceil(3.2));

Output:
floor(2.3)    is 2
ceil(3.2)    is 4

See also:
std.math.ceil
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