function show_type(arg){

  return typeof arg;

}

console.log(show_type(5));

console.log(show_type("heroina"));

console.log(show_type(null));

console.log(show_type(function(){}));

console.log(show_type(new Date()));

console.log(show_type(false));

console.log(show_type(undefined));

​

var d = new Date();

document.write(d);

​

function find_low(arr){

  arr.sort(function(a,b){return a - b;});

  if(arr.length>2){

    return arr[1] + " ," + arr[arr.length -2];

  }else{

    return arr[1];

  }

}

console.log(find_low([100, 40]));

console.log(find_low([1, 5, 10, 25, 40, 100]));

console.log(find_low([5, 1, 25, 40, 10, 100]));

​

function perfect(numb){

}

var sum = [1, 2, 3].reduce((a, b) => a + b, 0);

console.log(sum); // 6

​

/*Write a JavaScript function to 

convert an amount to coins. Go to the editor

Sample function : amountTocoins(46, [25, 10, 5, 2, 1])

Here 46 is the amount. and 25, 10, 5, 2, 1 are coins. 

Output : 25, 10, 10, 1*/

​

//another

function powerBank(number, power){

  return Math.pow(number, power);

}

console.log(powerBank(4, 0));

​

function stringify(arg){

}

​

function random_characters(amount){

    var text = " ";

    var charset = "abcdefghijklmnopqrstuvwxyz0123456789";

    for( var i=0; i < amount; i++ )

        text += charset.charAt(Math.floor(Math.random() * charset.length));

    return text;

}

​

console.log(random_characters(3));

​

function comb(_array, _number){

  var n = _array.length;

  function factorial(n) {

  return (n != 1) ? n * factorial(n - 1) : 1;

}

  //return _array.length + _number;

}

​

console.log(comb([1, 2, 4], 2));