Vinod, First time it loops, newstring = ‘’ oldstring = ‘Newton’ char = ‘N’ char + newstring = ‘N’ + ‘’ = ‘N’
Second time it loops, newstring = ‘N’ oldstring = ‘Newton’ char = ‘e’ char + newstring = ‘e’ +’N’ = ‘eN’ Third time it loops, newstring = ‘eN’ oldstring = ‘Newton’ char = ‘w’ char + newstring = ‘w’ +’eN’ = ‘weN’ Fourth time it loops, newstring = ‘weN’ oldstring = ‘Newton’ char = ‘t’ char + newstring = ‘t’ +’weN’ = ‘tweN’ Fifth time it loops, newstring = ‘tweN’ oldstring = ‘Newton’ char = ‘o’ char + newstring = ‘o’ +’tweN’ = ‘otweN’ Sixth/Final time it loops: newstring = ‘otweN’ oldstring = ‘Newton’ char = ‘n’ char + newstring = ‘n’ +’otweN’ = ‘notweN’ newstring after loop finishes will be ‘notweN’ which is the reverse of ‘Newton’ Let me know if that explanation helps you understand it better. There are built in functions to reverse a string that are more efficient than this approach that you should be using to reverse a string. -- Thanks, Nitin Madhok Clemson University CONFIDENTIALITY NOTICE This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain privileged and/or confidential information. If you are not the intended recipient of this e-mail, any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender by e-mail or telephone and permanently delete all copies of this e-mail and any attachments. > On Jan 29, 2018, at 1:42 AM, vinod bhaskaran <bhaskaran.vi...@gmail.com> > wrote: > > Hi, > > I am a new beginner in programming. > I saw a code (given below) to reverse string. > > newstring = '' > oldstring = 'Newton' > for char in oldstring: > newstring = char + newstring > print(newstring) > > > > Could someone explain how it is traversing to get the string reversed? > > As the new character is adding the char in the new string but how is it > getting reversed without any line giving the char number to be traversed in > reverse order. > > Thanks, > Vinod > _______________________________________________ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > https://mail.python.org/mailman/listinfo/tutor _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
