NAME copysign, copysignf, copysignl - copy sign CONTENTS Library Synopsis Description See Also Standards History LIBRARY .Lb libm SYNOPSIS .In math.h double copysign "double x" "double y" float copysignf "float x" "float y" long double copysignl "long double x" "long double y" DESCRIPTION The copysign, copysignf and copysignl functions return x with its sign changed to y s. SEE ALSO fabs(3), fdim(3), ieee(3), math(3) STANDARDS HISTORY