String toStringAsFixed(
int fractionDigits
)

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

/**
 * 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
 */
String toStringAsFixed(int fractionDigits);