How do you redeclare variables in switch block without an error?

If you try to redeclare variables in a switch block then it will cause errors because there is only one block. For example, the below code block throws a syntax error as below,

let counter = 1;

switch(x) {

case 0:

let name;

break;

case 1:

let name; // SyntaxError for redeclaration.

break;}

To avoid this error, you can create a nested block inside a case clause and create a new block scoped lexical environment.

let counter = 1;

switch(x) {

case 0: {

let name;

break;

}

case 1: {

let name; // No SyntaxError for redeclaration.

break;

}

}