JavaScript Arrays: Basics (অ্যারে)

const fruits = ["আম", "কলা", "কমলা", "লিচু"];
const numbers = [10, 20, 30];
const mixed = ["আনামুল", 28, true, null];
const empty = [];

console.log(fruits); // ["আম", "কলা", "কমলা", "লিচু"]

const fruits = ["আম", "কলা", "কমলা"];

console.log(fruits[0]); // "আম"  (সূচক ০ থেকে)
console.log(fruits[2]); // "কমলা"
console.log(fruits[3]); // undefined (এত element নেই)
console.log(fruits.at(-1)); // "কমলা" — শেষের element

const fruits = ["আম", "কলা", "কমলা"];

console.log(fruits.length); // 3
console.log(fruits[fruits.length - 1]); // "কমলা" — সর্বদা শেষ element

const fruits = ["আম", "কলা", "কমলা"];

fruits[1] = "আঙুর";
console.log(fruits); // ["আম", "আঙুর", "কমলা"]

const numbers = [1, 2, 3];

numbers.push(4);    // শেষে যোগ → [1, 2, 3, 4]
numbers.pop();      // শেষের বাদ → [1, 2, 3]
numbers.unshift(0); // শুরুতে যোগ → [0, 1, 2, 3]
numbers.shift();    // শুরুর বাদ → [1, 2, 3]

console.log(numbers); // [1, 2, 3]

const scores = [70, 85, 90];

for (let i = 0; i < scores.length; i++) {
  console.log(i, scores[i]);   // সূচকসহ
}

for (const score of scores) {
  console.log(score);          // শুধু মান
}

const scores = [70, 85, 90];

scores.forEach((score) => {
  console.log(score * 2);
});
// 140 170 180

scores.forEach((score, index) => {
  console.log(index, score);
});