add top quatation mark

 
string list[]= {"EUR","CHF","GBP","JPY","AUD","CAD","NZD","CHF"};
    for(int i=0; i<ArraySize(list); i++) string primer=list[i];
     {
     
      for(i=0; i<ArraySize(list); i++)
     {
     string second =list[i];   
     string currency = StringConcatenate(primer, second);
     }
     }

currency output is CHFCHF. how can i fix it to change "CHFCHF" instead of CHFCHF ?

i don't add top quotation mark in mql4. Thank you.

 
Add a double quote to the beginning and at the end. String Type - Data Types - Language Basics - MQL4 Reference
 
William Roeder #:
Add a double quote to the beginning and at the end. String Type - Data Types - Language Basics - MQL4 Reference

yes it works. thank you very much