core
                                D Language online tour (https://tour.dlang.org/) and online editor (https://run.dlang.io/)
                            
                        How to download and setup core
Open terminal and run command
                                            git clone https://github.com/dlang-tour/core.git
                                        
                                        git clone is used to create a copy or clone of core repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with core https://github.com/dlang-tour/core/archive/master.zip
Or simply clone core with SSH
                                            [email protected]:dlang-tour/core.git                                    
                                    If you have some problems with core
You may open issue on core support forum (system) here: https://github.com/dlang-tour/core/issuesSimilar to core repositories
Here you may see core alternatives and analogs
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