I'm having trouble printing a return value in my main function

[RedSkeleton007]

I'm missing something very basic here. The following code:

#!/usr/bin/env python3
#QuickTest.py
def summ(numThree,numFour):
    result = numThree + numFour
    return result

def main():
    numThree = 3
    numFour = 4
    summ(numThree,numFour)
    print(result)

main()

Gives this error:

Error:
========== RESTART: I:/Python/Python36-32/SamsPrograms/QuickTest.py ==========
Traceback (most recent call last):
  File "I:/Python/Python36-32/SamsPrograms/QuickTest.py", line 13, in <module>
    main()
  File "I:/Python/Python36-32/SamsPrograms/QuickTest.py", line 11, in main
    print(result)
NameError: name 'result' is not defined
>>>

I was expecting it to print 7. What's wrong?