Course summary

This course recommended the following best practices when writing error messages:

• Identify the cause of the error.
  • If the user entered an invalid value, specify the invalid value.
  • Specify requirements and constraints, such as required permissions or minimum RAM.
• Explain to fix the problem.
  • When appropriate, provide an example to help demonstrate the fix.
• Write clearly.
  • Be concise, not wordy. However, don't be so concise that the resulting error message becomes cryptic.
  • Avoid double negatives and exceptions to exceptions.
  • Aim the message at the appropriate target audience. Words appropriate for software engineers are often inappropriate for non-technical users.
  • Use terminology consistently. For example, don't use the term directory in one part of an error message and a folder in another part.
  • Format long error messages carefully, possibly using progressive disclosure or links to expanded documentation.
  • Set a positive tone.
  • Don't be overly apologetic.

Next unit: Additional guidelines for back end engineers