NEAREST — Nearest representable number¶

NEAREST(X, S)¶

NEAREST(X, S) returns the processor-representable number nearest to X in the direction indicated by the sign of S.

Parameters

X – Shall be of type REAL.
S – Shall be of type REAL and not equal to zero.

Returns

The return value is of the same type as X. If S is positive, NEAREST returns the processor-representable number greater than X and nearest to it. If S is negative, NEAREST returns the processor-representable number smaller than X and nearest to it.

Standard:: Fortran 90 and later
Class:: Elemental function

Syntax:

RESULT = NEAREST(X, S)

Example:

program test_nearest
  real :: x, y
  x = nearest(42.0, 1.0)
  y = nearest(42.0, -1.0)
  write (*,"(3(G20.15))") x, y, x - y
end program test_nearest