How to subtract an item in list and replace the result from which it was subtracted

Question

Suppose :

List_1 = [50]

What I am not able to do here is to subtract one(1) from "index 0 of list_1" ,
Then replace that resulted value from index 0 of list_1.

If someone has an answer or solution how they can code it, then please write it with explanation.

Thank you 😊.

Answer 1

Hi,
take list_1[0] item and give it his actual value and substracted by -1

list_1[0] = list[0] -1

Answer 2

Just like you can access an element of a list by index

print(List_1[0]) #outputs 50

You can also assign it a value
List_1[0] = any_value

Now I guess you can do the rest on your own

Answer 3

Sorry for the tag my bad

But thanks I appreciate ur help😊

Answer 4

It's not
list_1 = list_1(0) - 1

You have to use square brackets
list_1 = list_1[0] - 1

And according to me, it should be
list_1[0] = list_1[0] - 1
Because in your code, the whole list would be changed, not the first value of the list.

Also please change the tag of this question from 'python' to 'ruby'