update project

README.md

@@ -67,6 +67,18 @@ Your answer: 14
 Correct!
 
 
+## Brain-progression
+
+This is a game where you need to identify the missing number in an arithmetic progression.
+
+### How to play
+
+Run the game with:
+
+```bash
+npx brain-progression
+
+
 == Ссылка на игру
 
 Вы можете найти проект на GitHub: [Brain Games](https://github.com/vadimkulishov/frontend-project-44)

bin/brain-progression.js

@@ -0,0 +1,41 @@
+
+import readlineSync from 'readline-sync';
+
+
+const generateProgression = (length, step, start) => {
+  const progression = [];
+  for (let i = 0; i < length; i++) {
+    progression.push(start + i * step);
+  }
+  return progression;
+};
+
+const getRandomIndex = (length) => Math.floor(Math.random() * length);
+
+// Запуск игры
+const playProgressionGame = () => {
+  console.log('What number is missing in the progression?');
+
+  const length = 10; // Длина прогрессии
+  const step = Math.floor(Math.random() * 10) + 1;
+  const start = Math.floor(Math.random() * 10);
+
+  const progression = generateProgression(length, step, start);
+  const hiddenIndex = getRandomIndex(length);
+  const hiddenValue = progression[hiddenIndex];
+
+  progression[hiddenIndex] = '..';
+
+  console.log(`Question: ${progression.join(' ')}`);
+
+  const userAnswer = readlineSync.question('Your answer: ');
+
+  if (parseInt(userAnswer, 10) === hiddenValue) {
+    console.log('Correct!');
+  } else {
+    console.log(`'${userAnswer}' is wrong answer ;(. Correct answer was '${hiddenValue}'.`);
+    console.log('Let\'s try again!');
+  }
+};
+
+export default playProgressionGame;

package.json

@@ -11,7 +11,8 @@
     "brain-games": "bin/brain-games.js",
     "brain-even": "bin/brain-even.js",
     "brain-calc": "bin/brain-calc.js",
-    "brain-gcd": "bin/brain-gcd.js"
+    "brain-gcd": "bin/brain-gcd.js",
+    "brain-progression": "bin/brain-progression.js"
   },
   "author": "",
   "license": "ISC",