Question

How to use try/catch/finally in JavaScript

Answer 1

function myFunction() { 
 
    var n;
     
    try { 
        if(n == "")  throw "n is Empty";
        if(isNaN(n)) throw "n is not a number";
        if(n < 0)    throw "n is negative";
    }
    catch(err) {
        document.write(err + "<br />");
        document.write(err.message + "<br />");
    }
    finally {
        document.write("finally" + "<br />");
    }
}
  
document.write(myFunction()); 
 
  
/*
run:
 
n is not a number
undefined
finally
undefined  
 
*/

 

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