Today we’re going to talk about logs. Legato provides a number of input and output (I/O) methods. The choice and style of I/O can vary as much as programmers and users. Logs are a convenient method of keeping and relaying data without establishing a complex data formatting regiment. They are useful for reporting information to a user (such as the number of instances a search and replace operation changed the text, for example, or whether or not there were errors in an procedure). They are also employed by many high-level application functions, such as a validation function indicating a list of possible notices, warnings, and errors.