Standard Library Functions

According to wikipedia ... Standard stands for a level of quality or attainment. Library stand for collection of book. Function is an activity that is for a purpose of a person or thing. Therefore The Standard Library Functions are defined as ... "Standard Library are the collection of subprograms (function) which is used to develop other programs or software." ♥ Types of Functions 1- Library Functions (Header Files function) //In this post 2- User Defined Function (User Defined Functions) // In next post ♣ Character Functions Character Functions, are the collection of all the function related with characters. The header file is "ctype.h" is used to use following functions. # isalnum() - is - " Is " is used to form question. al- al stands " alphabet " . num...