what happen to return statement in catch block

Question

I have tried this code in javascript

function abc(){   try{      console.log(0);      throw "is empty";}   catch(err){      console.log(1);      return true;   }   finally{return false;}   return(4); } console.log(abc());  

I got output as false. I understand Finally always execute regardless of result of try catch but what happen to return statement in catch .

Answer 1

I understand Finally always execute regardless of result of try catch but what happen to return statement in catch .

Return statement in catch will be executed only if the catch block is reached, i.e. if there is an error thrown.

For example

function example() {      try {          throw new Error()         return 1;     }      catch(e) {         return 2;     }     finally {      }  }  

example() will return 2 since an error was thrown before return 1.

But if there is a finally block and this finally block has a return statement then this return will override catch return statement.

For example

function example() {      try {          throw new Error()         return 1;     }      catch(e) {         return 2;     }     finally {          return 3;     }  }  

Now example() will return 3.

In your example, there is a return statement after the finally block. That statement will never get executed.

Try

function example() {      try {          throw new Error()         return 1;     }      catch(e) {         return 2;     }     finally {          return 3;     }     console.log(5)    return 4; }  

It only outputs 3. 5 is never printed since after finally block value is returned.