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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              

<title>Tip Calculator</title>

<body id="container">
  
  <h1>Tip Calculator</h1>
  
  <div>  
  <Label id="billLabel">Enter Bill $</label>
  <input  type="text" id="billInput">
  <br> </br>  
  
  <label id="quality">Quality of Service</label>
  <select id="qualitySelector">      >
    <option disabled selected>Please select one</option>
    <option value=".25">Supurb 25%</option>
    <option value=".20">Very Good 20%</option>
    <option value=".15">Good 15%</option>
    <option value=".10">Fair 10%</option>
</select>
<br></br>

  <label id="people">How many people?</label>
  <input  type="text"id="totalPeople" >
  <br></br>   

 <button type="button" id="btn">Calculate</button>

<div id="results">
  <p id="your-tip">Tip is</p>
  <sup>$</sup> <span id="tip">0.00</span>
  <p id="Each">Each</p>
    </div>
</div>
</body>
            
          
!
            
              body{
    font-family: sans-serif;
  background: #71d13a;
  background: linear-gradient(to right, #8785ff, #89ffff);
  }

#container {
 background: #f4f7ca;
  width: 400px;
    height: 400px;
    padding: 10px 20px 10px 20px;
    position: absolute;
    top: 10%;
    left: 50%;
    margin-left: -200px;
    z-index: 2;   
    border: solid 2px #2D0238;
    border-radius: 15px;
    box-shadow: 4px 4px 5px #8b8484;
  }

h1{
  text-align: center;
  
}

#btn {
  display: block;
  width: 100px;
  height: 35px;
  border-radius: 10px;
  font-size: 20px;
  background: #49eef7;
}

#billLabel{
  font-weight: bold;
}

#quality{
  font-weight: bold;
}

#people {
  font-weight: bold;
}

#results {
  font-weight: bold;
  font-size: 20px;  
}

#tip {
  font-size: 30px;
}
            
          
!
            
              //Define variables
function calculateTip(){
    let billAmt = document.getElementById("billInput").value; // JS only use capital letter at the begining for classes
    let servQual = document.getElementById("qualitySelector").value;
    let numPeople = document.getElementById("totalPeople").value;
    let tipAmount;
     
    //validating input
    if (billAmt === "" || servQual === 0) { // you must use a logical operator to compare to zero
      window-alert("Please provide requested values.");
        return;
    }
    
    //still validating input
    if (numPeople === "" || numPeople <=1) {
      numPeople = 1;
    }  else {
      document.getElementById("results").style.display = "block";
    }
    
    
    //calculating the tip amount
    
    tipAmount = (billAmt*servQual)/numPeople;
    tipAmount = Math.round(tipAmount * 100)/ 100;
    tipAmount = tipAmount.toFixed(2);
    
    document.getElementById("tip").innerText = tipAmount;  
    
  }
    // document.getElementById("results").style.display = "none"; ---> Why are you hiding the result?
    document.getElementById("btn").onclick = function() {calculateTip()};
    
    
            
          
!
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