ctype.h library

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ctype.h library includes all character type functions.Following are the functions included in ctype.h library function.

isalnum()- this function is used to determine weather character is alpha-numeric or not.
isalpha()- this function is used to determine weather character is alphabetic or not.
isascii()- this function is used to determine weather character is ASCII or not.
iscntrl()- this function is used to determine weather character is control character or not.
isdigit()- this function is used to determine weather character is digit character or not.
islower()- this function is used to check weather character is lower case or not.
isupper()- this function is used to check weather character is upper case or not.
isspace()- this function is used to check weather character is space or not.
isprint()- this function is used to check weather character is printable or not.