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(elisp)Rounding Operations

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Rounding Operations
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   The functions `ffloor', `fceiling', `fround', and `ftruncate' take a
floating point argument and return a floating point result whose value
is a nearby integer.  `ffloor' returns the nearest integer below;
`fceiling', the nearest integer above; `ftruncate', the nearest integer
in the direction towards zero; `fround', the nearest integer.

 - Function: ffloor float
     This function rounds FLOAT to the next lower integral value, and
     returns that value as a floating point number.

 - Function: fceiling float
     This function rounds FLOAT to the next higher integral value, and
     returns that value as a floating point number.

 - Function: ftruncate float
     This function rounds FLOAT towards zero to an integral value, and
     returns that value as a floating point number.

 - Function: fround float
     This function rounds FLOAT to the nearest integral value, and
     returns that value as a floating point number.


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