Index for Section 3

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

SYNOPSIS
  #include <math.h>

  int itrunc(
	  double x );

  unsigned int uitrunc(
	  double x );

LIBRARY
  Standard C Library (libc.a)

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.

SEE ALSO
  Files: float.h, fp.h, limits.h, machine/fpu.h, math.h,

  IEEE Standard for Binary Floating-Point Arithmetic

Index for Section 3

Alphabetical listing for I

Top of page