XLISP oddp

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# oddp

Type: | - | predicate function (subr)
Source: | - | xlmath.c

## Syntax

(oddp expr)
  expr - the integer numeric expression to check
  returns - T if the integer is odd, NIL otherwise

## Description

The 'oddp' predicate function checks to see if the number 'expr' is odd. T is returned if the number is odd, NIL is returned otherwise.

An error is generated if the 'expr' is not a numeric expression:

    error: bad argument type

An error is generated if the 'expr' is a floating point number:

    error: bad floating point operation

Zero is an even number.

## Examples

    (oddp 0)     ; returns NIL
    (oddp 1)     ; returns T
    (oddp 2)     ; returns NIL
    (oddp -1)    ; returns T
    (oddp -2)    ; returns NIL

    (oddp 13.0)  ; error: bad floating point operation
    (oddp 'a)    ; error: bad argument type
    (setq a 3)   ; set value of A to 3
    (oddp a)     ; returns T

See the oddp predicate function in the XLISP 2.0 manual.

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Nyquist / XLISP 2.0 - Contents | Tutorials | Examples | Reference