text: // Sum Numbers
  function sum (numbers) {
      "use strict";
      console.log( numbers.reduce( ( previousValue, currentValue ) => previousValue + currentValue,
      0 ) )
  
      return numbers.reduce( ( previousValue, currentValue ) => previousValue + currentValue,
      0 )
  
  };
  
  
  // Function Tests
  
  sum([])  // 0)
  sum([1, 5.2, 4, 0, -1])  // 9.2)
  