Write a C program to calculate sum of Fibonacci series up to a given terms
WAP to accept two integers and an operator as a character (+,-,*,/) perform the corresponding operation and display the result.
Write a program to check whether given character is a digit or a character in lowercase or uppercase alphabet.
(Hint ASCII value of digit is between 48 to 58 and Lowercase characters have ASCII values in the range of 97 to122,
uppercase is between 65 and 90) */