The term debugging indicates the activity of identifying the portion of code in which one or more errors (bugs) are detected in software following its use.
The error can be localized during the testing phase of the program; that is when it is still in the development phase and is not yet ready to be used by the end-user, or during the use of the program by the latter. After finding the error, the debugging phase ensues and identifies the software part in which the error lies, which is sometimes very complex.
Nowadays, this activity is supported by specific applications and debuggers, which show the execution to the programmer using step-by-step software instructions, allowing the viewing and analysis of the inputs and outputs of the program itself at the same time.
Before these tools were available for the activity of identifying and correcting errors...