The definition between a jail and a prison is very much depends on what state you are in.
For example in Texas, you've sat in jail for 6 month and receive a 1 year sentence, you will not be sent to prison, you will remain in the jail for the next 6 months. You can remain in 'jail' for years sometimes before being sent to a prison facility, even after sentencing.
For example in Texas, you've sat in jail for 6 month and receive a 1 year sentence, you will not be sent to prison, you will remain in the jail for the next 6 months. You can remain in 'jail' for years sometimes before being sent to a prison facility, even after sentencing.