float [Function]

float number {&optional prototype} => float

Arguments and Values::

number---a real.

prototype---a float.

float---a float.

Description::

float converts a

real

number to a float.

If a prototype is supplied, a float is returned that is mathematically equal to number but has the same format as prototype.

If prototype is not supplied, then if the number is already a float, it is returned; otherwise, a float is returned that is mathematically equal to number but is a single float.

Examples::

 (float 0) =>  0.0
 (float 1 .5) =>  1.0
 (float 1.0) =>  1.0
 (float 1/2) =>  0.5
=>  1.0d0
OR=> 1.0
 (eql (float 1.0 1.0d0) 1.0d0) =>  true

See Also::

section coerce [Function]

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