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Zod · Method

.negative

z.number().negative() validates numbers below zero. In Zod Mini, use z.number().check(z.negative()) for the same check.

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Syntax

z.number().negative()

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  • z.number()
  • z.positive()
  • z.nonpositive()
  • z.negative()
  • z.number().check()

Source: Defining schemas | Zod. Checked 2026-11-03.