An integer data type is used to represent whole numbers without any fractional or decimal component. In the given options:
A. The number of students in a section is a countable quantity that does not require a fractional part, making it suitable for an integer data type.
B. The cost of a dinner including tax and tip would typically involve a decimal to account for cents, thus requiring a floating-point data type.
C. The weights of patients are usually measured with precision and can have decimal values, necessitating a floating-point data type.
D. An approximation of the number pi to five decimal places is a decimal value and would require a floating-point data type.
References:
The use of integer data types for countable quantities is a fundamental concept in programming and can be found in introductory programming textbooks such as “Starting Out with Programming Logic and Design” by Tony Gaddis and online resources like the Mozilla Developer Network’s (MDN) Web Docs on JavaScript data types.
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