StringDrop

StringDrop["string",n] gives "string" with its first n characters dropped. 

StringDrop["string",-n] gives "string" with its last n characters dropped. 

StringDrop["string",{n}] gives "string" with its nth character dropped. 

StringDrop["string",{m,n}] gives "string" with characters m through n dropped. 

StringDrop[{s1,s2,…},spec] gives the list of results for each of the si.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.