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Function ZEROP

Syntax

  • zerop numbergeneralized-boolean

Arguments and Values

Description

Returns true if number is zero (integer, float, or complex); otherwise, returns false.

Regardless of whether an implementation provides distinct representations for positive and negative floating-point zeros, (zerop -0.0) always returns true.

Examples

(zerop 0) → true (zerop 1) → false (zerop -0.0) → true (zerop 0/100) → true (zerop #c(0 0.0)) → true

Side Effects

None.

Affected By

None.

Exceptional Situations

Should signal an error of type type-error if number is not a number.

See Also

None.

Notes

(zerop number) ≡ (= number 0)