If GDB is not installed on your PC, install it using your package manager (apt, pacman, emerge, etc). You can check if GDB is installed on your PC with following command. There is official Nim GDB Youtube Video.If you want to learn more about GDB, check GDB User Manual. You can stop your program at specified point and print a value of variable or run it line by line. Compile your program so that you can debug it with GDB.If you found my articles interesting or useful, please donate using following links: