Write a JavaScript program to check whether a given number is presents in the range 40..10000

function test_digit(x, y, n) 
  {    
    if (n < 40 || n > 10000)
      return false;
    else
      if (n >= x && n <= y)
        return true;
      else
        return false;
  }
console.log(test_digit(40, 4000, 45));  
console.log(test_digit(80, 320, 79));  
console.log(test_digit(89, 4000, 30));