Web development
Variables and Data Types
Updated Oct 28, 2026
Variables store values. Use const for a binding you do not reassign and let for one you plan to reassign. Common values include strings, numbers, and booleans. A string in quotes is different from a n
What you’ll learn
Understand and practise variables and data types.
Explanation
Variables store values. Use const for a binding you do not reassign and let for one you plan to reassign. Common values include strings, numbers, and booleans. A string in quotes is different from a number even when both contain digits.
Variable រក្សាទុកតម្លៃ។ ប្រើ const សម្រាប់ឈ្មោះដែលមិនផ្ដល់តម្លៃថ្មី និង let សម្រាប់តម្លៃដែលអាចផ្លាស់ប្ដូរ។ ប្រភេទសាមញ្ញមាន string, number និង boolean។
Example
const name = "Dara"; let score = 2; score = score + 1;
Practice
After these statements, what is score?
Answer and explanation
Show answer / បង្ហាញចម្លើយ
3. The final statement adds 1 to the previous value of 2.
Quick recap
Variables store values.