4 signum function – Casio CFX-9970G Algebraic Expressions User Manual

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Signum Function

The signum function described in this section is available in the ALGBR Mode.

Syntax: signum ([)]

• A solution can be obtained only when is a numeric value.

Definition:

1 (real number,

A

> 0)

Undefined (

A

= 0)

–1 (real number,

A

< 0)

|

A

|

signum

(

A

)

(

A

= imaginary number)

A

Example

To solve signum (3.1)

K5

(sign)

d.bw

1

Example

To solve signum (–4)

K5

(sign)

-ew

– 1