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nearest (Rev #2)

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Description

nearest(x, s) returns the processor-representable number nearest to x in the direction indicated by the sign of s.

Standard

Fortran 95 and later

Class

Elemental function

Syntax

result = nearest(x, s)

Arguments

• x - Shall be of type real.
• s - (Optional) shall be of type real and not equal to zero.

Return value

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.

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

Revision from April 30, 2009 20:16:43 by Jason Blevins

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