if nums [3] = nums [1], then nums [1] = nums [3], therefore the output will not be 2, but 4. Why then output 2?

Question

Is mathematics in programming something different from ordinary mathematics? Explain.

https://code.sololearn.com/ceTkzAA5NhHv/?ref=app

Answer 1

U change the value of num[3] by the value of num[1] but u must know the value of num[1] still be fixed
If u want the value of num[1] = the value of num[3] u should write
num[1] =num[3] = 4 . In this case there are have the same value

Answer 2

= in programming is an assignment operator, it means "becomes" when you said nums[3]=nums[1] you nums[3] becomes nums[1] so nums[3]=2

Answer 3

Hey иван In Your Code You’re Using Assignment Operator Which Will Assign The Value Of One Variable To Another Variable.
So In Your Solution
nums=[1,2,3,4,5]
nums[3]=nums[1]
In Above Statement You Assigned The Value Of Index 1 To Index 3.
So Now Your List Is Updated
nums=[1,2,3,2,5]
And print(nums[3]) Gives You Output - 2.
And This Happened Because List Is Mutable.

Answer 4

thanks everyone! now I understand