E: unable to locate package idle3 in Ubuntu 18.04 [closed]

The idle3 package in Ubuntu has been renamed to three different packages: idle-python3.6, idle-python3.7 and idle-python3.8. Please install the idle3 package that matches your system's Python 3.x version. Python 3.6 is the default Python 3.x version in Ubuntu 18.04, and the command to install idle3 for this version in Ubuntu 18.04 is sudo apt install idle-python3.6. To show the system's Python 3.x version open the terminal and type:

python3