Sum function not working when trying to add numbers in lists using python-CodePudding

I am trying to create a program that takes only even numbers from a range of numbers from 1 to 100 and add all of the even numbers. I am a beginner and I have been trying to get this working since yesterday, and nothing I have tried works. This is my first post, so sorry if the format is wrong but here is my code.

for i in range(1, 100):
   if i % 2 == 0:
      x = [I]
      y = sum(x)
      print(y)

CodePudding user response：

The problems with your code has multiple issues that - 1)if you want to get all even numbers from 1 to 100, your range should be (1, 101); 2) the way you build list is wrong (syntax); 3) the sum expect an iterable (list).

There are a few ways to accomplish this sum from 1 to 100 (inclusive), here it will start with yours, and try to show List Comprenshion and Generator Expression way:

lst = []   # to store the build-up list
tot = 0    # to store the answer
for i in range(1, 101):
    if i % 2 == 0:        # it's a even number
       lst.append(i)      # store it into lst 

tot = sum(lst)            # 2550

Generator expression:

all_evens_sum = sum(x for x in range(1, 101) if x % 2 == 0)  # 2550

Or List Comprehension:

lst = [x for x in range(1, 101) if x % 2 == 0]   # even nums 
total = sum(lst)                # 2550

CodePudding user response：

I am a beginner too but it looks I can help you some.

for i in range(1, 100):
  if(i % 2 == 0):
    sum  = i
print(sum) // do what you want