Project Euler, Problem #6, Python

# Find the difference between the sum of the squares of the first one
# hundred natural numbers and the square of the sum.

# Solution #1

natNumSum = 0
the_range = range(1, 101)

for i in the_range:
    natNumSum += i

natNumSquareSum = 0
for i in the_range:
    natNumSquareSum += i ** 2

print(natNumSum ** 2 - natNumSquareSum)

# 25164150
# 4 function calls in 0.000 seconds

# Solution #2

the_range = range(1, 101)

natural_numbers_sum_square = sum(the_range) ** 2
natural_numbers_squares_sum = sum([i ** 2 for i in the_range])

print(natural_numbers_sum_square - natural_numbers_squares_sum)

# 25164150
# 7 function calls in 0.000 seconds

# Solution #3

the_range = range(1, 101)
natural_numbers_sum_square = sum(the_range) ** 2
natural_numbers_squares_sum = sum(map((lambda x: x ** 2), the_range))

print(natural_numbers_sum_square - natural_numbers_squares_sum)

# 25164150
# 106 function calls in 0.000 seconds