Summary
Formats a number using fixed-point notation
Method of Number | |
|---|---|
| Implemented in | JavaScript 1.5 |
| ECMAScript Edition | ECMAScript 3rd Edition |
Syntax
number.toFixed( [digits] )
Parameter
- digits
- The number of digits to appear after the decimal point; this may be a value between 0 and 20, inclusive, and implementations may optionally support a larger range of values. If this argument is omitted, it is treated as 0.
Returns
A string representation of number that does not use exponential notation and has exactly digits digits after the decimal place. The number is rounded if necessary, and the fractional part is padded with zeros if necessary so that it has the specified length. If number is greater than 1e+21, this method simply calls Number.toString() and returns a string in exponential notation.
Throws
- RangeError
- If digits is too small or too large. Values between 0 and 20, inclusive, will not cause a
RangeError. Implementations are allowed to support larger and smaller values as well.
- TypeError
- If this method is invoked on an object that is not a
Number.
Example
var n = 12345.6789; n.toFixed(); // Returns "12346": note rounding, no fractional part n.toFixed(1); // Returns "12345.7": note rounding n.toFixed(6); // Returns "12345.678900": note added zeros (1.23e+20).toFixed(2); // Returns "123000000000000000000.00" (1.23e-10).toFixed(2); // Returns "0.00" 2.34.toFixed(1); // Returns "2.3" -2.34.toFixed(1); // Returns -2.3 (due to operator precedence, negative numbers don't return a string...) (-2.24).toFixed(1); // Returns "-2.3" (...unless you use parentheses)
