Challenge - Look and say sequence

Question

In mathematics, the look-and-say sequence is the sequence of integers beginning as follows:
1, 11, 21, 1211, 111221, 312211, 13112221, 1113213211, ...

To generate a member of the sequence from the previous member, read off the digits of the previous member, counting the number of digits in groups of the same digit. For example:

1 is read off as "one 1" or 11.
11 is read off as "two 1s" or 21.
21 is read off as "one 2, then one 1" or 1211.
1211 is read off as "one 1, one 2, then two 1s" or 111221.
111221 is read off as "three 1s, two 2s, then one 1" or 312211.

For more info - https://en.wikipedia.org/wiki/Look-and-say_sequence

Answer 1

Task -
Make a code in any language to find the sequence from 1st element to inputted element.

Sample input -
5

Sample Output -
1
11
21
1211
111221

Answer 2

Here's my C# implementation! ✌

I think my solution is quite general and I treat the number in the sequence as string instead of integer as it overflows after the 8th term. Happy coding! 😄

https://code.sololearn.com/c33uCTSQMCaD/?ref=app

Answer 3

My attempt in java
https://code.sololearn.com/cfrqJW0w1Qnf/?ref=app

Answer 4

My try -
https://code.sololearn.com/cZDyRHMn3t4a/?ref=app

Answer 5

in Python: most difficult job done by itertools module :(

https://code.sololearn.com/cWtXec6j81FM/?ref=app

Answer 6

here's my Python code.. 🐍
https://code.sololearn.com/c2WC86HZ1Wc9/?ref=app

Answer 7

The late attempt of a noob amateur:
Python: https://code.sololearn.com/cDcmDzi4cREB/
Ruby: https://code.sololearn.com/c797ADtbS3yJ/

Answer 8

Read 1 as one 1 and can be written as 1(one) 1 = 11
then 11 = two 1 = 2(two) 1 = 21 then 21 = ....

Answer 9

Cooooooool

https://code.sololearn.com/cTx6R3GlbQW1/?ref=app
https://code.sololearn.com/cOHQf30VXiu5/?ref=app

Answer 10

Python Implementation
https://code.sololearn.com/c50Xbi2Usduq/?ref=app

Answer 11

This challenge https://www.sololearn.com/Discuss/743988/?ref=app gave me an idea using cpp:
https://code.sololearn.com/cDbVW5OlE5nz/?ref=app

Answer 12

my practice on python https://code.sololearn.com/cP3jG3tMlbjF/#py

Answer 13

So interesting! :D

Answer 14

Here you go. Checks for valid input.
https://code.sololearn.com/cO1854rla0ic/?ref=app

Answer 15

https://code.sololearn.com/cB2BYfvAv3vZ/?ref=app

Answer 16

Requires 2 numeric inputs, # of iterations & starting value...

https://code.sololearn.com/coXzn6Rd1a4P/?ref=app

Answer 17

here a working example in javascript. Wrote it on the mobile phone so i am going to prettify it later :)
https://code.sololearn.com/WV2qkykK7dsH/?ref=app

Answer 18

One recursive solution

https://code.sololearn.com/c67o4aJVNkQ9/?ref=app

Answer 19

sample input 1
sample output
1
11

Answer 20

here is my python solution it includes iconic recursion with a mix of single for loop.

https://code.sololearn.com/cefSElP3WfBr/#py