#elisp
Function:
floor number &optional divisorThis returns number , converted to an integer by rounding downward
(towards negative infinity).
If divisor is specified, this uses the kind of division
operation that corresponds to mod, rounding downward.
(floor 1.2) ⇒ 1
(floor 1.7) ⇒ 1
(floor -1.2) ⇒ -2
(floor -1.7) ⇒ -2
(floor 5.99 3) ⇒ 1
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GNU Emacs Lisp Reference Manual: Numeric Conversionsrror.
Function: truncate number &optional divisor This returns number , converted to an integer by rounding towards
zero.
(truncate 1.2)
⇒ 1
(truncate 1.7)
⇒ 1
(truncate -1.2)
⇒ -1
(truncate -1.7)
⇒ -1
<span>Function: floor number &optional divisor This returns number , converted to an integer by rounding downward
(towards negative infinity).
If divisor is specified, this uses the kind of division
operation that corresponds to mod , rounding downward.
(floor 1.2)
⇒ 1
(floor 1.7)
⇒ 1
(floor -1.2)
⇒ -2
(floor -1.7)
⇒ -2
(floor 5.99 3)
⇒ 1
Function: ceiling number &optional divisor This returns number , converted to an integer by rounding upward
(towards positive infinity).
(ceiling 1.2)
⇒ 2
(ceiling 1.7)
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