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<h2>With "use strict":</h2>
<h3>Using a variable without declaring it, is not allowed.</h3>

<p>Activate debugging in your browser (F12) to see the error report.</p>

<script>
"use strict";
x = 3.14;  // This will cause an error (x is not defined).
</script>
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<center>
<p> Creater By <b> Sanusanth </b> </p>
<a href="https://github.com/sanusanth">Visit Sanusanth</a>
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