float

float Function

Syntax:

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 
<i>!</i> 1.0d0 <i><sub>or</sub></i> 
*!* 1.0 
(eql (float 1.0 1.0d0) 1.0d0) *! true* 

See Also:

coerce

Expanded Reference: float

tip

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(float )