evenp, oddp

evenp, oddp Function

Syntax:

evenp integer → generalized-boolean

oddp integer → generalized-boolean

Arguments and Values:

integer—an integer .

generalized-boolean—a generalized boolean.

Description:

evenp returns true if integer is even (divisible by two); otherwise, returns false.

oddp returns true if integer is odd (not divisible by two); otherwise, returns false.

Examples:

(evenp 0) → true 
(oddp 10000000000000000000000) → false 
(oddp -1) → true 

Exceptional Situations:

Should signal an error of type type-error if integer is not an integer .

Notes:

(evenp integer) ≡ (not (oddp integer))

(oddp integer) ≡ (not (evenp integer))

Expanded Reference: evenp, oddp

tip

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(evenp, oddp )