#### Exercise 27

Write a program in Python as a function that calculates the sum of elements in a list of numbers. And another that multiplies all the elements of a list of numbers.

#### Solution

`# Function that calculate the product of list elements`

def mult(l):

m = 1

# run through the list elements

for x in l:

m = m*x

return m

print(mult([2,5,3]))

# Function that calculate the sum of list elements

def sum(l):

s = 0

# run through the list elements

for x in l:

s = s + x

return s

print(sum([2,5,3]))

**Younes Derfoufi**