Question

I declaring a string of Special Characters.

var SpecialCharSequence = "',!,#,$,%,&,',(,),*,+,-,.,\,/,:,;,<,=,>,?,@,[,],^,_,{,|,},~,";

Why its giving a error for backward Slash

Unrecognized escape sequence    

When already its in Quotation marks.

Answer 1

Thats because your string contains \ which is an escape character.

replace \ with \\.

var SpecialCharSequence = "',!,#,$,%,&,',(,),*,+,-,.,\\,/,:,;,<,=,>,?,@,[,],^,_,{,|,},~,";