SPACING

Elemental Intrinsic Function (Generic): Returns the absolute spacing of model numbers near the argument value.

Syntax

result = SPACING (x)

x
(Input) Must be of type real.

Results

The result type is the same as x. The result has the value b^e-p. Parameters b, e, and p are defined in Model for Real Data. If the result value is outside of the real model range, the result is TINY(x).

See Also

TINY, RRSPACING, Data Representation Models

Examples

If 3.0 is a REAL(4) value, SPACING (3.0) has the value 2^-22.

The following shows another example:

 REAL(4) res4
 REAL(8) res8, r2
 res4 = SPACING(3.0)   ! returns 2.384186E-07
 res4 = SPACING(-3.0)  ! returns 2.384186E-07
 r2   = 487923.3
 res8 = SPACING(r2)    ! returns 5.820766091346741E-011