9. add game brain-prime.js

Author: WisdomQuest

README.md

@@ -3,4 +3,5 @@
 https://asciinema.org/a/zNBty6rqBic6N4Zn5Dmt2Sscb
 https://asciinema.org/a/1gZpYskJ5KBIjVJ1hPz54XRTA
 https://asciinema.org/a/71IF0vgTroz1mKOkWNXso17kC
-https://asciinema.org/a/25qN41IugvU3deXO70Rq9PAGq
+https://asciinema.org/a/25qN41IugvU3deXO70Rq9PAGq
+https://asciinema.org/a/gyUhtJxKZVqdo0qDGTZrCiMtm

bin/brain-prime.js

@@ -0,0 +1,6 @@
+#!/usr/bin/env node
+import { welcomeUser } from '../src/games/cli.js';
+import primeGame from '../src/games/prime.js';
+
+welcomeUser();
+primeGame();

package.json

@@ -23,7 +23,8 @@
     "brain-even": "bin/brain-even.js",
     "brain-calc": "bin/brain-calc.js",
     "brain-gcd": "bin/brain-gcd.js",
-    "brain-progression": "bin/brain-progression.js"
+    "brain-progression": "bin/brain-progression.js",
+    "brain-prime": "bin/brain-prime.js"
   },
   "dependencies": {
     "lodash": "^4.17.21",

src/games/prime.js

@@ -0,0 +1,25 @@
+import roundGame from '../index.js';
+import randomNumber from '../utilRandomNumber.js';
+
+const descriptionGame = 'Answer "yes" if given number is prime. Otherwise answer "no".';
+
+const actionGame = () => {
+  const questionNum = randomNumber(20);
+  let correctAnswer = 'yes';
+  for (let i = 2; i < Math.sqrt(questionNum); i += 1) {
+    if (questionNum % i === 0) {
+      correctAnswer = 'no';
+    }
+  }
+  if (questionNum === 0) {
+    correctAnswer = 'no';
+  }
+  return [questionNum, correctAnswer];
+};
+
+const primeGame = () => {
+  console.log(descriptionGame);
+  roundGame(actionGame);
+};
+
+export default primeGame;