# getUint64 method

int getUint64 (int byteOffset, [ Endian endian = Endian.big ])

Returns the positive integer represented by the eight bytes starting at the specified `byteOffset` in this object, in unsigned binary form.

The return value will be between 0 and 264 - 1, inclusive.

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

## Implementation

    int getUint64(int byteOffset, [Endian endian = Endian.big]);