Python: functions: return statement

‘return’ statement is used to return a value from function to the caller.

test.py

def factorial(n):
 if(n<=1):
  return 1
  
 result=1
 
 for i in range(2, n+1):
  result *= i
 return result
 
print(factorial(1))
print(factorial(2))
print(factorial(3))
print(factorial(4))
print(factorial(5))

$ python3 test.py

1

2

6

24

120

‘return’ without an expression argument returns None.

def hello():

         print("Hello")

print(hello())

$ python3 test.py

Hello
None

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