Function: ftruncate

ftruncate is a function defined in floatfns.c.

Signature

(ftruncate ARG)

Documentation

Truncate a floating point number to an integral float value.

(Round toward zero.)

Other relevant functions are documented in the number group.

View in manual

Probably introduced at or before Emacs version 19.23.

Shortdoc

;; number
(ftruncate 1.2)
    => 1.0

Source Code

// Defined in /usr/src/emacs/src/floatfns.c
{
  CHECK_FLOAT (arg);
  double d = XFLOAT_DATA (arg);
  d = trunc (d);
  return make_float (d);
}