Which statement best describes the relationship among integers, strings, and booleans?

• A. Integers are true/false values
• B. Strings are numeric digits only
• C. Booleans are words
• D. Integers are whole numbers; strings are text; booleans are true/false

Answer: (D)

Different data types serve different purposes. Integers are whole numbers used for counting and arithmetic. Strings are text, a sequence of characters that can include letters, spaces, and symbols. Booleans represent truth values, true or false, and are used in logical decisions and condition testing. Saying integers are true/false confuses numeric values with logical values, and saying strings are numeric digits only wrongly limits strings to digits when they can hold any characters. Saying booleans are words mischaracterizes them as text rather than true/false values. The best description is that integers are whole numbers; strings are text; booleans are true/false. For example, age might be an integer, name a string, and isMember a boolean.