String Membership

Your task for this coding challenge is to write a function called char_in_string that takes in two strings as parameters, letter and message. The first parameter, letter, will only have one character in it. The function should return True if message contains the character in letter and False otherwise.

Sample Input 1:

b
book

Sample Output 1:

True

Sample Input 2:

c
book

Sample Output 2:

False