What does the input format define?

The input format is crucial in defining how to interpret the contents of that input. This includes specifying the type of data being received (such as strings, integers, or characters), the structure of that data, and any delimiters or encoding that are used. Understanding the input format allows a program to accurately parse and utilize the information provided by the user or another system.

For example, if a program is expecting a CSV (Comma-Separated Values) file, the input format will dictate how to read each line, recognize commas as delimiters, and convert the resulting strings into appropriate data types. This ensures that the program understands the intended meaning of the data it processes, which is fundamental for accurate data analysis and manipulation.

The other options relate to different aspects of data handling but do not directly pertain to defining how input contents are interpreted. Processing data, outputting results, and encrypting data involve separate considerations that come into play after the input format has been established.