Final answer:
The most suitable name for a function that checks if a number is an integer is IS_INTEGER, as it is clear, descriptive, and aligned with common programming naming conventions.
Step-by-step explanation:
The most appropriate name for a procedure that checks if a given number is an integer would be IS_INTEGER. The most suitable name for a function that checks if a number is an integer is IS_INTEGER, as it is clear, descriptive, and aligned with common programming naming conventions.
This name is descriptive and clearly indicates the function of the procedure, which is to determine if the input is an integer. The procedure CHECK_INTEGER could also be suitable, but IS_INTEGER is the most straightforward and conventional naming for such a function within programming practices.