Time......second is behaving wierd!

Question

See the output....see the seconds for sometime, it behaving weird...first 01, 02, 03...,09 then 10, 20, 30, 40....,10, then again 01......why so!?
https://code.sololearn.com/W3ydsplgP5ss/?ref=app

Answer 1

Line 19:
Change to below code:

number = "0" + number;

number+="0" work like number=number+"0"