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<!DOCTYPE html>
<html>
<body>
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<h2>JavaScript Numbers</h2>
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<p>A common mistake is to expect this result to be 102030:</p>
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<p id="demo"></p>
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<script>
var x = 10;
var y = 20;
var z = "30";
var result = x + y + z;
document.getElementById("demo").innerHTML = result;
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_numbers_add_strings4 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:28:13 GMT -->
</html>
​
​
​
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