Multiple Data type in cucumber

Hello All, This is our Scenerio " Feature: Is this valid number?
  Tell us if it's a valid number  Scenario Outline: Is this a valid number
    Given a <number>
    When I ask is it a valid number
    Then I should be told "<answer>"  Examples:
    | number          | answer |
    | 1              | Yes    |
    | One            | Nope   |
    | 1.3            | can't say|" and this is our step def " const assert = require("assert");
const { Given, When, Then } = require("@cucumber/cucumber");function isItNumber(number) {
  if (number === 1) {
    return "Yes";
  } else if (number === "One") {
    return "Nope";
  } else {
    return "can't say";
  }
}Given("a {number}", function (number) {
  console.log("this.number", number);
  this.a = number;
});When("I ask is it a valid number", function () {
  this.actualAnswer = isItNumber(this.a);
});Then("I should be told {string}", function (expectedAnswer) {
  assert.strictEqual(this.actualAnswer, expectedAnswer);
});" But we are getting error with this.