Mathematical_Calculations.py

# Mohammad Hossein Zehtab
# Advanced_Python_Wednesdays
# Project_01:_Problem01_Mathematical_Calculations

numbers = [2, 6, -2, -80, 7, 19, 302, 1001, 6430, -2341, 3, -7]

# -----------------------------------------------------------------------------
# Summation and number of even nuumbers in the list
count = 0
summation = 0

for number in numbers:
    if abs(number) % 2 == 0:
        summation += number
        count += 1
print(f"There are {count} even number in the list and their summation is\
 {summation}")

# -----------------------------------------------------------------------------
# Multiplication of negative numbers of the list
multiplication = 1

for number in numbers:
    if number < 0:
        multiplication *= number
print(f"\nMultiplication of the negative numbers of the list is {multiplication}")

# -----------------------------------------------------------------------------
# Average of 4 digit numbers of the list
count4 = 0
summ4 = 0

for number in numbers:
    if len(str(abs(number))) == 4:
        summ4 += number
        count4 += 1
print(f"\nAverage of 4 digit numbers of the list is {summ4 / count4}")