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Viết hàm để tìm số Fibonacci thứ n trong dãy Fibonacci bằng TypeScript.
TYPESCRIPT 2.X CĂN BẢN
CÁC CHỦ ĐỀ
BÀI MỚI NHẤT
Viết hàm để tìm số Fibonacci thứ n trong dãy Fibonacci bằng TypeScript.
Dãy Fibonacci là một chuỗi số trong đó mỗi số là tổng của hai số trước nó trong chuỗi đó, bắt đầu từ 0 và 1. Trong bài viết này, mình sẽ viết một hàm trong TypeScript để tìm số Fibonacci thứ n. Đây là một bài tập cơ bản giúp củng cố kiến thức về vòng lặp và đệ quy.
Tìm số Fibonacci thứ n trong TypeScript
Mình sẽ bắt đầu bằng việc viết một hàm để tìm số Fibonacci thứ n:
function findFibonacciNumber(n: number): number {
if (n <= 1) {
return n; // Trường hợp cơ bản khi n là 0 hoặc 1
} else {
let previous = 0;
let current = 1;
let result = 0;
for (let i = 2; i <= n; i++) {
result = previous + current;
previous = current;
current = result;
}
return result;
}
}
Sử dụng Hàm findFibonacciNumber
Hãy xem cách sử dụng hàm findFibonacciNumber
để tìm số Fibonacci thứ n:
let n: number = 7; // Số thứ tự trong dãy Fibonacci
let fibonacciNumber: number = findFibonacciNumber(n);
console.log(`Số Fibonacci thứ ${n} là: ${fibonacciNumber}`);
Hàm findFibonacciNumber
:
Sử dụng vòng lặp để tính số Fibonacci thứ n bằng cách cộng hai số trước đó.
Sử dụng ba biến để theo dõi các số trong dãy Fibonacci.
Kết quả khi chạy chương trình sẽ là:
Số Fibonacci thứ 7 là: 13
Bài tập này giúp bạn làm quen với việc tìm số Fibonacci thứ n trong dãy Fibonacci bằng TypeScript. Lưu ý rằng, việc sử dụng vòng lặp để tính toán số Fibonacci thay vì đệ quy có thể giúp tăng hiệu suất với các giá trị lớn hơn của n. Hãy tiếp tục thực hành để nắm vững kiến thức và xây dựng các chương trình phức tạp hơn trong TypeScript.
Bài giải
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