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Which is/are the function(s) to check if the type of a variable is integer?

59. Which is/are the function(s) to check if the type of a variable is integer?

1. is_int()
2. is_integer()
3. is_long()
4. All of the above

Answer: D) All of the above

Explanation:

The all of the functions is_int(), is_integer(), and is_long() are used to check if the type of a variable is integer.