The toFixed()
method formats a number using fixed-point notation.
numObj.toFixed([digits])
digits
Optional
0
and 20
, inclusive, and implementations may optionally support a larger range of values. If this argument is omitted, it is treated as 0
.A string representing the given number using fixed-point notation.
RangeError
digits
is too small or too large. Values between 0
and 100
, inclusive, will not cause a RangeError
. Implementations are allowed to support larger and smaller values as chosen.TypeError
Number
.toFixed()
returns a string representation of numObj
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 the absolute value of numObj
is greater or equal to 1e+21
, this method simply calls Number.prototype.toString()
and returns a string in exponential notation.
Warning: Floating point numbers cannot represent all decimals precisely in binary. This can lead to unexpected results, such as 0.1 + 0.2 === 0.3
returning false
.
let numObj = 12345.6789 numObj.toFixed() // Returns '12346': note rounding, no fractional part numObj.toFixed(1) // Returns '12345.7': note rounding numObj.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' 2.35.toFixed(1) // Returns '2.4'. Note it rounds up 2.55.toFixed(1) // Returns '2.5'. Note it rounds down - see warning above -2.34.toFixed(1) // Returns -2.3 (due to operator precedence, negative number literals don't return a string...) (-2.34).toFixed(1) // Returns '-2.3'
Specification |
---|
ECMAScript (ECMA-262) The definition of 'Number.prototype.toFixed' in that specification. |
Desktop | ||||||
---|---|---|---|---|---|---|
toFixed |
1 | 12 | 1 | 5.5 | 7 | 2 |
Mobile | ||||||
---|---|---|---|---|---|---|
toFixed |
1 | 18 | 4 | 10.1 | 1 | 1.0 |
Server | |
---|---|
toFixed |
0.1.100 |
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https://wiki.developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toFixed