I can't output the value of button for example I have a button the value are (1, 2, 3, 4.....12). When I clicked 6 buttons example the value are (1,2,3,4,5,6) and clicked the generate button the value of button will be output on the page. And clicked another 6 button output in the newline. And Do not repeat the same number.
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<p id = "demo"></p>
<input type = "button" name = "btn" value = "1">
<input type = "button" name = "btn" value = "2">
<input type = "button" name = "btn" value = "3">
<input type = "button" name = "btn" value = "4">
<input type = "button" name = "btn" value = "5">
<input type = "button" name = "btn" value = "6"><br>
<input type = "button" name = "btn" value = "7">
<input type = "button" name = "btn" value = "8">
<input type = "button" name = "btn" value = "9">
<input type = "button" name = "btn" value = "10">
<input type = "button" name = "btn" value = "11">
<input type = "button" name = "btn" value = "12"><br><br>
<button onclick = "document.getElementById("demo").innerHTML = Print()">Generate</button>
<script>
function Print(num1) {
btn.value = btn.value + num1;
}
</script>
</body>
</html>
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