function not returning string values

Question

I would like to return the string values of m & t from my message function to use in cipher function to perform a while loop and once false print the message reverse. The error message I am receiving is "NameError: name 'm' is not defined", but 'm' has been defined in message which i am attempting to return for use in cipher along with 't'.

def main():
    message()
    cipher(m, t)


def message():
    m = input("Enter your message: ")
    t = ''
    return m, t


def cipher(m, t):
    i = len(m) - 1
    while i >= 0:
        t = t + m[i]
        i -= 1
    print(t)


if __name__ == '__main__': main()

m is not defined in main()

Stephen Rauch
– Stephen Rauch ♦

2018-03-02 01:38:01 +00:00
Commented Mar 2, 2018 at 1:38 — Stephen Rauch
– Stephen Rauch ♦, Commented Mar 2, 2018 at 1:38

kingkupps · Accepted Answer · 2018-03-02 01:39:25Z

5

When you call your message() function, you need to store the return values.

def main():
    m, t = message()
    cipher(m, t)

answered Mar 2, 2018 at 1:39

kingkupps

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2 Comments

user3574939 Over a year ago

That worked! Thank You. Whenever I want to return a value from a function in python will I need to do this ?

kingkupps Over a year ago

You could also do cipher(message()). Functions only return values. Variables declared in functions do not leave the scope of the function they are called in. Scope is a really important concept in all programming languages that I know of. python-textbok.readthedocs.io/en/1.0/Variables_and_Scope.html

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