7.12.11.3 The nextafter functions

Synopsis

1

#include <math.h>
double nextafter(double x, double y);
float nextafterf(float x, float y);
long double nextafterl(long double x, long double y);

Description

2

The nextafter functions determine the next representable value, in the type of the function, after x in the direction of y, where x and y are first converted to the type of the function.[1] The nextafter functions return y if x equals y. A range error may occur if the magnitude of x is the largest finite value representable in the type and the result is infinite or not representable in the type.

Returns

3

The nextafter functions return the next representable value in the specified format after x in the direction of y.

Footnotes

[1]

The argument values are converted to the type of the function, even by a macro implementation of the function.