What are the Python Functions and how to create them?

Functions are the re-usable set of code which helps to organize structure of the code.

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Functions are created so that we can run a statements multiple times during the program without repeating ourselves.

Creating functions in Python

In Python def keyword is used to start a function.

def functionname(arg1, arg2, .... argN):
#statement inside the function

Body of the function can be omitted by using the pass keyword.E.g:

def myfirstfunc():
pass

def sum(start, end):
answer = 0
for i in range(start, end + 1):
answer += i
print(result)
sum(20, 60)

sum(start, end) function calculates the sum of all the numbers starting from start to end.

Function with return value

The return statement sends a result back to the caller and exits the function.

def sum(start, end):
answer = 0
for i in range(start, end + 1):
answer += i
return answer
s = sum(20, 60)
print(s)

Return multiple values from Function

Return statement can be used to return multiple values from function by separating them with a comma.

Multiple values are returned as tuples.

def greater(x, y):
if x > y:
return x, y
else:
return x, y
s = greater(5, 10)
print(s)
print(type(s))

Python Programming

Ayesha

Tech writer at newsandstory