If you enable the \"View Right Margin\" in your IDE of choice, it is likely that it will default to 80 characters. I tend to change it to 120 for no reason other than it was th
Have mercy on the programmers who have to maintain your software later and stick to a limit of 80 characters.
Reasons to prefer 80:
Readable with a larger font on laptops
Leaves space for putting two versions side by side for comparison
Leaves space for navigation views in the IDE
Prints without arbitrarily breaking lines (also applies to email, web pages, ...)
Limits the complexity in one line
Limits indentation which in turn limits complexity of methods / functions
Yes, it should be part of the coding standard.