Accessing inner function variable in outer function in javascript?

Question

I am trying to access the value of inner function variable outside. But I cannot use it outside the inner function. My code is-

function t9(){
   var start=298;
   var diff;
   function count(){
      var end=400;
      var diff=end-start;
   } 
   return diff;
}

You're declaring count, but never calling it. Is that intentional? — icktoofay
– icktoofay, Commented Apr 12, 2014 at 7:07

Sahil Mittal · Accepted Answer · 2014-04-12 07:06:40Z

4

Dont re-declare the variable, so instead of : var diff=end-start; write- diff=end-start;

Thats it

answered Apr 12, 2014 at 7:06

Sahil Mittal

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Comments

Govind Singh · Accepted Answer · 2014-04-12 07:18:16Z

0

function t9()
  var start=298;
  return count(start);
}

function count(start){
   var end=400;
   var diff=end-start;
   return diff;
  }

edited Apr 12, 2014 at 7:18

answered Apr 12, 2014 at 7:06

Govind Singh

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Comments

Tuhin · Accepted Answer · 2014-04-12 07:29:47Z

0

function t9(){
   var start=298;
   var diff;
   var end;
   function count(){

      end=400;
      diff=end-start;
   } 
   count();
   alert(diff);
}
t9();

answered Apr 12, 2014 at 7:29

Tuhin

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