why yield this result?

[skygragon]

jq 1.5 on mac

# echo -n '{"id":9224851642388483}' | jq .
{
  "id": 9224851642388484
}

[linquize]

JSON does not have int64 type. It treats this number as Number type that store as a floating point number, which may lose precision for int64.

see #1652 and https://github.com/stedolan/jq/wiki/FAQ#numbers

[pkoppstein]

See also PR #1752