How to extract elements of a list and append?












2












$begingroup$


A beginner's question:



Is there a way to extract elements of a list and append them into ONE number?



For example, if there is a list L={13,5,8,0}, then I am looking for a way to append 13, 5, 8 and 0 to produce the result 13580.






list-manipulation







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Sreekz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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    2












    $begingroup$


    A beginner's question:



    Is there a way to extract elements of a list and append them into ONE number?



    For example, if there is a list L={13,5,8,0}, then I am looking for a way to append 13, 5, 8 and 0 to produce the result 13580.






    list-manipulation







    share|improve this question









    New contributor




    Sreekz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.







    $endgroup$















      2












      2








      2





      $begingroup$


      A beginner's question:



      Is there a way to extract elements of a list and append them into ONE number?



      For example, if there is a list L={13,5,8,0}, then I am looking for a way to append 13, 5, 8 and 0 to produce the result 13580.






      list-manipulation







      share|improve this question









      New contributor




      Sreekz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.







      $endgroup$




      A beginner's question:



      Is there a way to extract elements of a list and append them into ONE number?



      For example, if there is a list L={13,5,8,0}, then I am looking for a way to append 13, 5, 8 and 0 to produce the result 13580.






      list-manipulation




      list-manipulation






      share|improve this question









      New contributor




      Sreekz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question









      New contributor




      Sreekz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question








      edited 41 mins ago









      m0nhawk

      2,57711531




      2,57711531






      New contributor




      Sreekz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 41 mins ago









      SreekzSreekz

      112




      112




      New contributor




      Sreekz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      Sreekz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      Sreekz is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






















          3 Answers
          3






          active

          oldest

          votes


















          2












          $begingroup$

          You can convert the list numbers to strings, then join and finally convert back to number:



          L = {13, 5, 8, 0};
          

          
ToExpression[StringJoin[ToString /@ L]]
          
(* 13580 *)





          share|improve this answer









          $endgroup$





















            2












            $begingroup$

            Or FromDigits:



            FromDigits[{13, 5, 8, 0}]
            

            
13580





            share|improve this answer









            $endgroup$









            • 1




              $begingroup$
              (+1) you will need something like FromDigits[Flatten@IntegerDigits@L] to cover cases like L={1, 13, 5, 8, 0}.
              $endgroup$
              – kglr
              21 mins ago










            • $begingroup$
              Thanks @kglr for showing a more general (robust) approach.
              $endgroup$
              – Rabbit
              7 mins ago



















            1












            $begingroup$

            FromDigits @ StringJoin @ IntegerString @ L



            13580




            FromDigits @ StringJoin @ IntegerString @ {13, 5, 38, 13}



            1353813







            share|improve this answer









            $endgroup$













              Your Answer





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              3 Answers
              3






              active

              oldest

              votes








              3 Answers
              3






              active

              oldest

              votes









              active

              oldest

              votes






              active

              oldest

              votes









              2












              $begingroup$

              You can convert the list numbers to strings, then join and finally convert back to number:



              L = {13, 5, 8, 0};
              

              
ToExpression[StringJoin[ToString /@ L]]
              
(* 13580 *)





              share|improve this answer









              $endgroup$


















                2












                $begingroup$

                You can convert the list numbers to strings, then join and finally convert back to number:



                L = {13, 5, 8, 0};
                

                
ToExpression[StringJoin[ToString /@ L]]
                
(* 13580 *)





                share|improve this answer









                $endgroup$
















                  2












                  2








                  2





                  $begingroup$

                  You can convert the list numbers to strings, then join and finally convert back to number:



                  L = {13, 5, 8, 0};
                  

                  
ToExpression[StringJoin[ToString /@ L]]
                  
(* 13580 *)





                  share|improve this answer









                  $endgroup$



                  You can convert the list numbers to strings, then join and finally convert back to number:



                  L = {13, 5, 8, 0};
                  

                  
ToExpression[StringJoin[ToString /@ L]]
                  
(* 13580 *)






                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered 35 mins ago









                  m0nhawkm0nhawk

                  2,57711531




                  2,57711531























                      2












                      $begingroup$

                      Or FromDigits:



                      FromDigits[{13, 5, 8, 0}]
                      

                      
13580





                      share|improve this answer









                      $endgroup$









                      • 1




                        $begingroup$
                        (+1) you will need something like FromDigits[Flatten@IntegerDigits@L] to cover cases like L={1, 13, 5, 8, 0}.
                        $endgroup$
                        – kglr
                        21 mins ago










                      • $begingroup$
                        Thanks @kglr for showing a more general (robust) approach.
                        $endgroup$
                        – Rabbit
                        7 mins ago
















                      2












                      $begingroup$

                      Or FromDigits:



                      FromDigits[{13, 5, 8, 0}]
                      

                      
13580





                      share|improve this answer









                      $endgroup$









                      • 1




                        $begingroup$
                        (+1) you will need something like FromDigits[Flatten@IntegerDigits@L] to cover cases like L={1, 13, 5, 8, 0}.
                        $endgroup$
                        – kglr
                        21 mins ago










                      • $begingroup$
                        Thanks @kglr for showing a more general (robust) approach.
                        $endgroup$
                        – Rabbit
                        7 mins ago














                      2












                      2








                      2





                      $begingroup$

                      Or FromDigits:



                      FromDigits[{13, 5, 8, 0}]
                      

                      
13580





                      share|improve this answer









                      $endgroup$



                      Or FromDigits:



                      FromDigits[{13, 5, 8, 0}]
                      

                      
13580






                      share|improve this answer












                      share|improve this answer



                      share|improve this answer










                      answered 26 mins ago









                      RabbitRabbit

                      327139




                      327139








                      • 1




                        $begingroup$
                        (+1) you will need something like FromDigits[Flatten@IntegerDigits@L] to cover cases like L={1, 13, 5, 8, 0}.
                        $endgroup$
                        – kglr
                        21 mins ago










                      • $begingroup$
                        Thanks @kglr for showing a more general (robust) approach.
                        $endgroup$
                        – Rabbit
                        7 mins ago














                      • 1




                        $begingroup$
                        (+1) you will need something like FromDigits[Flatten@IntegerDigits@L] to cover cases like L={1, 13, 5, 8, 0}.
                        $endgroup$
                        – kglr
                        21 mins ago










                      • $begingroup$
                        Thanks @kglr for showing a more general (robust) approach.
                        $endgroup$
                        – Rabbit
                        7 mins ago








                      1




                      1




                      $begingroup$
                      (+1) you will need something like FromDigits[Flatten@IntegerDigits@L] to cover cases like L={1, 13, 5, 8, 0}.
                      $endgroup$
                      – kglr
                      21 mins ago




                      $begingroup$
                      (+1) you will need something like FromDigits[Flatten@IntegerDigits@L] to cover cases like L={1, 13, 5, 8, 0}.
                      $endgroup$
                      – kglr
                      21 mins ago












                      $begingroup$
                      Thanks @kglr for showing a more general (robust) approach.
                      $endgroup$
                      – Rabbit
                      7 mins ago




                      $begingroup$
                      Thanks @kglr for showing a more general (robust) approach.
                      $endgroup$
                      – Rabbit
                      7 mins ago











                      1












                      $begingroup$

                      FromDigits @ StringJoin @ IntegerString @ L



                      13580




                      FromDigits @ StringJoin @ IntegerString @ {13, 5, 38, 13}



                      1353813







                      share|improve this answer









                      $endgroup$


















                        1












                        $begingroup$

                        FromDigits @ StringJoin @ IntegerString @ L



                        13580




                        FromDigits @ StringJoin @ IntegerString @ {13, 5, 38, 13}



                        1353813







                        share|improve this answer









                        $endgroup$
















                          1












                          1








                          1





                          $begingroup$

                          FromDigits @ StringJoin @ IntegerString @ L



                          13580




                          FromDigits @ StringJoin @ IntegerString @ {13, 5, 38, 13}



                          1353813







                          share|improve this answer









                          $endgroup$



                          FromDigits @ StringJoin @ IntegerString @ L



                          13580




                          FromDigits @ StringJoin @ IntegerString @ {13, 5, 38, 13}



                          1353813








                          share|improve this answer












                          share|improve this answer



                          share|improve this answer










                          answered 15 mins ago









                          kglrkglr

                          179k9199410




                          179k9199410






















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