createNewAccumlator.js

/*Create a constructor function Accumulator(startingValue).

Object that it creates should:

Store the “current value” in the property value. The starting value is set to the argument of the constructor startingValue.
The read() method should use prompt to read a new number and add it to value.
In other words, the value property is the sum of all user-entered values with the initial value startingValue.
*/


function Accumulator(startingValue) {
  //holds the startingValue to be minipulated
  this.value = startingValue;

  this.read = function () {
    //adds the prompted amount to the value at the moment
    this.value += parseFloat(prompt("what is the first value"));
  };
}


let accumulator = new Accumulator(1); // initial value 1
accumulator.read(); // adds the user-entered value
accumulator.read(); // adds the user-entered value
alert(accumulator.value); // shows the sum of these values