redeclare variables in switch block without an error in JavaScript

JavaScript

🤖 Code Explanation

This code is written in JavaScript. It uses the switch statement to control the value of the variable a. If the value of a is 1, the code will execute the case 1 statement and set the value of b to 2. If the value of a is 2, the code will execute the case 2 statement and set the value of b to 3. If the value of a is anything else, the code will execute the default statement and set the value of b to 4.

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