import os

# Clear screen
os.system("clear") # Mac or Linux
#os.system("cls") # Windows

def contains(string, char):
    "Check if a string contain a single character"
    # Iterate the string, character by character
    for i in string:
        # If current character matches provided character, stop and return True
        if i == char:
            return True

    # At the end, if no match was found; return False
    return False

userInputString = input("Input a string: ")
userInputChar = input("Input a single char: ")

# Call contains function and output results
if contains(userInputString, userInputChar):
    print(userInputString, "does contain", userInputChar)
else:
    print(userInputString, "does not contain", userInputChar)