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Code will check whether the number entered is integer or not.
ignore extracts characters from the input sequence and discards them. The extraction ends when max characters have been extracted and discarded or when the character delim(\n) is found, whichever comes first.
In the latter case, the...
(View Snippet) For all functions, a domain error occurs if an input argument is outside the domain over which the mathematical function is defined. On a domain error, the function returns an implementation-defined value.
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