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<p>First line will be stored in a first component and second line will be stored in a second component and so on.</p>
<p> </p>
<p>use strict; : to check typing errors</p>
<p>use warnings; : to make easy debugging ( find and modify errors )</p>
<p> </p>
<p>subroutine : to make a module and utilize it in main program (we can use it anytime)</p>
<p> basic structure of subroutine :</p>
<p>sub subroutine name {</p>
<p>execute statement</p>
<p>}</p>
<p> </p>
<p> </p>