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itrunc(3) Library Functions Manual 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 func- tion 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 in- teger, 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 ex- ceeds 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 delim off itrunc(3)