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<!--
#1
  When the button is clicked, all prices should change to 199
-->
<span class="price">299</span>
<span class="price">299</span>
<span class="price">299</span>

<button id="mybutton">Click me</button>

<script>
var elem = document.getElementById('mybutton');
  function onClick(e){
  	target our class "price", and then change that value to 199;
    elem = 199;
  }
  
</script>



<!--
#2
  Write a function that takes in a name and spits out "Hello [name]" in the output div
-->
<div id="output"></div>

<script>

</script>



<!-- 
#3
  Find the largest and smallest number in an unsorted integer array
-->
<script>
    const nums = [1, 2, 6, 12, 9];
  	nums.sort((a,b) => a - b);
  	const smallestNum = nums[0];
  	const largestNum = nums[nums.length - 1];
  
</script>



<!--
#4
  Find the missing number in a given integer array of 1 to 100
it is sorted
it should have every but its missing one number from 1 - 100

compare to the previous number to current numbers difference. this difference should be 1

-->
<script>
  if(nums.length <= 1) {
  	return 
  }
  for(let i = 1; i < nums.length; i++) {
    let difference = nums[i] - nums[i-1];
    if(difference !== 1){
    	return (nums[i] - 1);
    }
  }    
  return null;
</script>