String Length in JavaScript
FREE
The string length property in JavaScript returns the length of string in UTF-16 code units. It returns 0 when the string is empty, it's length. JavaScript uses a UTF-16 string format to depict the most common characters, consisting of a 16-bit data unit. The value returned by length does not match the number of characters in the string. When a string is empty, its length is 0.
Transform Your Career
Choose from our industry-leading programs designed for career success
Modern Software and AI Engineering Program
Master full-stack development with AI integration
+1000 moreModern Data Science and ML with specialisation in AI
Advanced data science techniques with AI specialization
+1000 moreAdvanced AIML with Specialisation in Agentic AI
Deep dive into AIML with focus on Agentic systems
+1000 moreDevOps, Cloud & AI Platform Engineering
Build and manage AI-powered cloud infrastructure
+1000 moreAI Engineering Advanced Certification by IIT-Roorkee
Premier AI engineering certification from IIT-Roorkee
Syntax
The syntax of string length property in JavaScript is:
Where string is the name of the string. The string length property in JavaScript doesn't take any parameters.
Return Value
The string length property will return the number of characters present in the string.
Examples
Scaler Placement Report and Statistics
Scaler learners achieved 2.5x salary growth with average post-Scaler CTC reaching ₹23L.
Google
Amazon
Microsoft
Flipkart
Adobe1200+ moreJavaScript Code to Show the Working of string.length Property
Output:
Assigning to length
Output:
Turn Learning into Career Growth
Browser compatibility
| Browser | length |
|---|---|
| Chrome | 1 |
| Edge | 12 |
| Firefox | 1 |
| Internet Explorer | 3 |
| Opera | 3 |
| Safari | 1 |
| WebView Android | 1 |
| Chrome Android | 18 |
| Firefox for Android | 4 |
| Opera Android | 10.1 |
| Safari on iOS | 1 |
| Samsung Internet | 1.0 |
| Deno | 1.0 |
| Node.js | 0.10.0 |
Conclusion
- The string length property in JavaScript determines the length of the string, that is, the number of characters it contains.
- Internally, to calculate the number of characters, it counts the number of code units occupied by the string.
- In the case of an empty string, it returns 0.
