Data analysis is the systematic examination of stored data to produce useful summaries, comparisons, or other information. A program can read large amounts of data from a file, store the values, and examine them efficiently. section 23.0
A beginner-friendly analysis workflow is:
- Read a structured file line by line. section 23.0
- Save the file’s numbers and strings in variables. section 23.0
- Analyze the stored information by finding averages, maximums, minimums, or duplicates. section 23.0
Friends’ phone numbers
A program can read a file containing friends’ names and phone numbers, store the information, and use phone-number area codes to show where friends live and count the states represented. section 23.0









