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 <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
    <title>Prime Numbers </title>
</head>
<p> Enter Values Here </p>
n1 <input type = "number" id = "n1" value=20 />
n2 <input type = "number" id = "n2" value=20 />
n3 <input type = "number" id = "n3" value=20 />
n4 <input type = "number" id = "n4" value=20 />
n5 <input type = "number" id = "n5" value=20 />
n6 <input type = "number" id = "n6" value=20 />
n7 <input type = "number" id = "n7" value=20 />
n8 <input type = "number" id = "n8" value=20 />
n9 <input type = "number" id = "n9" value=20 />
n10 <input type = "number" id = "n10" value=20 />
​
​
<p>Addition</p>
<button onclick="sum()"> Total</button>
<p id="demo2">Total </p>
<script>
 function sum() { 
    var inputValues = {};
​
    for (var i = 1; i <= 10; i++) {
        inputValues['input_' + i] = parseInt(document.getElementById("n"+i).value);
    }    
    
    var total = Object.values(inputValues).reduce((a, b) => {
      return a + b;
    })
     
    document.getElementById("demo2").innerHTML = `Total ${total} ${isPrime(total)}`;
  }
  
  function isPrime(num) {
    if (num <= 1) { 
        return false;
    } else {
        for (var i = 2; i < num; i++) {
            if (num % i === 0) {
                return 'Not Prime'; 
            }
        }
        return 'Prime';
    }  
}
</script>
</html>
Output 300px

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