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How to get a string representation of a number in JavaScript?
Use the toString() method to get the string representation of a number. This method converts any number to its string equivalent and supports different number bases for advanced use cases.
Syntax
number.toString() number.toString(radix)
Parameters
radix (optional): An integer between 2 and 36 representing the base for numeric representation. Default is 10 (decimal).
Basic Example
<!DOCTYPE html>
<html>
<body>
<script>
var num1 = 25;
document.write(num1.toString() + "<br>");
document.write((30.2).toString() + "<br>");
document.write((-40).toString() + "<br>");
document.write((15.5).toString());
</script>
</body>
</html>
25 30.2 -40 15.5
Using Different Bases
<!DOCTYPE html>
<html>
<body>
<script>
var num = 15;
document.write("Decimal: " + num.toString() + "<br>");
document.write("Binary: " + num.toString(2) + "<br>");
document.write("Octal: " + num.toString(8) + "<br>");
document.write("Hexadecimal: " + num.toString(16));
</script>
</body>
</html>
Decimal: 15 Binary: 1111 Octal: 17 Hexadecimal: f
Alternative Methods
<!DOCTYPE html>
<html>
<body>
<script>
var num = 42;
// Using toString()
document.write("toString(): " + num.toString() + "<br>");
// Using String() constructor
document.write("String(): " + String(num) + "<br>");
// Using template literal
document.write("Template literal: " + `${num}` + "<br>");
// Using concatenation
document.write("Concatenation: " + (num + ""));
</script>
</body>
</html>
toString(): 42 String(): 42 Template literal: 42 Concatenation: 42
Comparison
| Method | Supports Base | Handles null/undefined | Performance |
|---|---|---|---|
toString() |
Yes | No - throws error | Fast |
String() |
No | Yes | Fast |
| Template literal | No | Yes | Moderate |
| Concatenation | No | Yes | Slowest |
Conclusion
Use toString() for converting numbers to strings, especially when you need different number bases. For safer conversion that handles null values, use String() constructor instead.
Updated on: 2026-03-15T23:18:59+05:30
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