function isNegativeNumberimport { isNegativeNumber } from "https://deno.land/x/isx@1.0.0-beta.18/mod.ts"; isNegativeNumber(value: unknown): value is numberWhether the value is negative number or not. Parametersvalue: unknown Any value. import { isNegativeNumber } from "https://deno.land/x/isx@$VERSION/mod.ts" import { assertEquals } from "https://deno.land/std@$VERSION/testing/asserts.ts" assertEquals(isNegativeNumber(-1), true) assertEquals(isNegativeNumber(0), false) Returnsvalue is number