Can someone simply explain what effect does ‘len’ have in this code output please

Question

nums = [1, 2, 3]
for i in range (len(nums)):
nums.insert(i,i+2)

print(nums)

Answer 1

len() function returns the size of any itterible data type. So here len(nums) would return 3 as the size of nums has 3 elements.

So this code uses len() to go through every element of the nums list.

Answer 2

You can just use append() method instead of insert() method like :

nums.append(i+2)

edit: Jenkins

nums = [1, 2, 3]
for i in range(len(nums)):
nums.append(i+2)

print(nums)

Answer 3

Jayakrishna🇮🇳 Got it, thanx bro!

Answer 4

nums = [1, 2, 3]
for i in range (len(nums)):
nums.insert(i,i+2)

print(nums)

What would I do if i wanted the output to be [1, 2, 3, 2, 3, 4,] without chnaging the value in the nums list?