simple example of Closures in JavaScript

//we have an outer function named walk and an inner function named flyfunction walk (){  var dist = '1780 feet';  function fly(){    console.log('At '+dist);  }  return fly;}var flyFunc = walk(); //calling walk returns the fly function which is being assigned to flyFunc//you would expect that once the walk function above is run//you would think that JavaScript has gotten rid of the 'dist' varflyFunc(); //Logs out 'At 1780 feet'//but you still can use the function as above //this is the power of closures