Index for Section 3

Alphabetical listing for I

itrunc(3)
NAME
  itrunc, uitrunc - Truncate a floating-point number

LIBRARY
  Standard C Library (libc.a)

SYNOPSIS
  int itrunc(
       double x);
  unsigned int uitrunc(
       double x);

DESCRIPTION
  The itrunc function returns the signed integer nearest to the double-
  precision floating value x in the direction of 0.0.  This effectively
  truncates x by discarding its fraction component.  The  uitrunc function
  also truncates the double x, but returns an unsigned integer value.

  If x is a NaN or a negative value that exceeds the size of a signed
  integer, itrunc returns INT_MIN.   If x is a positive value that exceeds
  the size of a signed integer, itrunc returns INT_MAX.

  If x is a NaN or a negative value that exceeds the size of an unsigned
  integer, uitrunc returns a zero.   If x is a positive value that exceeds
  the size of an  unsigned integer, itrunc returns UINT_MAX.


RELATED INFORMATION
  Files: limits.h, math.h, float.h, fp.h, machine/fpu.h.

  IEEE Standard for Binary Floating-Point Arithmetic