Returns a decimal-point string-representation of this.
Converts this to a double before computing the string representation.
If the absolute value of this is greater or equal to 10^21 then this
methods returns an exponential representation computed by
this.toStringAsExponential(). Otherwise the result
is the closest string representation with exactly fractionDigits digits
after the decimal point. If fractionDigits equals 0 then the decimal
point is omitted.
The parameter fractionDigits must be an integer satisfying:
0 <= fractionDigits <= 20.
Examples:
1.toStringAsFixed(3); // 1.000
(4321.12345678).toStringAsFixed(3); // 4321.123
(4321.12345678).toStringAsFixed(5); // 4321.12346
123456789012345678901.toStringAsFixed(3); // 123456789012345683968.000
1000000000000000000000.toStringAsFixed(3); // 1e+21
5.25.toStringAsFixed(0); // 5
Source
String toStringAsFixed(int fractionDigits);