<function name="WriteUInt64" parent="net" type="libraryfunc"> <description> Appends an unsigned integer with 64 bits to the current net message. <note>⤶ The limit for an uint64 is 18'446'744'073'709'551'615. Everything above the limit will be set to the limit. Unsigned numbers **do not** support negative numbers. ⤶ </note>⤶ </description>⤶ ⤶ The limit for an uint64 is 18'446'744'073'709'551'615. ⤶ Everything above the limit will be set to the limit. ⤶ Unsigned numbers **do not** support negative numbers. </description>⤶ <realm>Shared</realm> <added>2023.08.30</added> <args> <arg name="uint64" type="string">The uint64 to be sent. Can be a number. <arg name="uint64" type="string">The 64 bit value to be sent. Can be a number. <warning> Since Lua cannot store full 64-bit integers, this function returns a string. It is mainly aimed at usage with <page>Player:SteamID64</page>. Since Lua cannot store full 64-bit integers, this function takes a string. It is mainly aimed at usage with <page>Player:SteamID64</page>. If your input is a number and not a string, it won't be networked correctly as soon as it has more than 13 digits. This is because Lua represents numbers over 13 digits as `1e+14`(`100 000 000 000 000`) You can do something like this to convert it to a string: `string.format("%.0f", number)`. If you try to use <page>Global.tostring</page> it will fail because it will create a result something like `1e+14` which doesn't work. </warning> </arg> </args> </function>