Returns a string representation of the BigFloat rounded to the specified
number of digits after the decimal point.
toFixed(digits, roundingMode?, radix?)
digits
The number of digits after the decimal point.
roundingMode optional
A rounding mode as in BigFloatEnv. Defaults to BigFloatEnv.RNDNA (Round to nearest, with ties away from zero rounding mode).
radix optional
The radix of the result between 2 and 36. Defaults to 10.
A string representing the value.
123.4567l.toFixed(1)
"123.5"
123.4567l.toFixed(1, BigFloatEnv.RNDD)
"123.4"
65535l.toFixed(2, BigFloatEnv.RNDNA, 16)
"ffff.00"