how to divide 8/4/2 if we got this as input ?

Question

I Want to perform the mathamatical operations on input according to the user input.
input can be anything as shown below :
-------------------..................... - - - - - - - --
Example :

Input : 1+2+3+4+5
output : 15

input : 2-4-5-6
output : - 13

input : 3*2*4*3
output : 72

input : 8/2/2
output : 2.0

My attempt :

https://code.sololearn.com/cGDCZeJsOn3U/?ref=app

Edit : I know the eval() function but I want to do it without using eval()

Answer 1

One way could be the following:
1) in case of /, set total to lst[0] before entering the loop
2) in case of /, skip the first iteration of lst

Another thing:
Mind catching zero division error if there is a 0 in the lst

Answer 2

if you want to do it in a very easy, flexible (and unsafe) way - you can simply write:

calc =input("Enter :")
print(eval(calc))

Answer 3

Martin Ed sorry to tell later but I know the eval() method
but I want to do without it..

Answer 4

Here is one possible solution, but it still lacks error handling (as Lisa mentioned already earlier):

https://code.sololearn.com/cpRlo02MPlCu/?ref=app

Answer 5

Lisa I did it Thank you so much for the hints :

any bugs?? :

https://code.sololearn.com/cJAIucJ331b3/?ref=app

Answer 6

Lisa OK I will edit it Thanks again! 😊

Answer 7

On zero division error:
Maybe you could
- actually raise an error or
- print a message so the user notices what he/she did wrong or
- print a None result
instead of just "passing" the division error.

Consider we input 4/0/2.
Your code outputs 2.0 which mathematically doesn't make sense as division through 0 is not defined, right?