# setFloat64 method

void setFloat64 (int byteOffset, double value, [ Endian endian = Endian.big ])
override

Sets the eight bytes starting at the specified `byteOffset` in this object to the IEEE 754 double-precision binary floating-point (binary64) representation of the specified `value`.

Throws RangeError if `byteOffset` is negative, or `byteOffset + 8` is greater than the length of this object.

## Implementation

    void setFloat64(int byteOffset, double value, [Endian endian = Endian.big]) =>
        _unsupported();