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<p><strong>&lt;Variables&gt;</strong></p> <p>:A name that refers to a value or an object.</p> <p>Variable names can start only with letters &amp;underscore.</p> <p>Value assignment to variable:&nbsp; Use &#39;=&#39;</p> <p>e.g) greeting=&#39;Hello, World!&#39;</p> <p>n=42</p> <p><strong>&lt;Standard input and output&gt;</strong></p> <p>Typically, standard output is a console on the screen. Standard input is a keyboard input.</p> <p>1.Print() function</p> <p>print(1, &#39;kilobyte means&#39;, 1024, &#39;bytes&#39;)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1 kilobyte means 1024 bytes</p> <p>2. input() function</p> <p>number=int(input(&#39;Enter a number:&#39;))&nbsp; &nbsp; &nbsp;3</p> <p>print(number+1)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;4</p> <p><strong>&lt;Control flows: conditional statements&gt;</strong></p> <p>Ex)</p> <p>number=5</p> <p>if number&lt;10:</p> <p>&nbsp; &nbsp; if number%2==0:</p> <p>&nbsp; &nbsp; &nbsp; &nbsp; print(&#39;A single digit even number&#39;)</p> <p>&nbsp; &nbsp; else:</p> <p>&nbsp; &nbsp; &nbsp; &nbsp; print(&#39;A single digit odd number&#39;)</p> <p>else:</p> <p>&nbsp; &nbsp; if number%2==0:</p> <p>&nbsp; &nbsp; &nbsp; &nbsp; print(&#39;An even number with two or more digits&#39;)</p> <p>&nbsp; &nbsp; else:</p> <p>&nbsp; &nbsp; &nbsp; &nbsp; print(&#39;An odd number with two or more digits&#39;)</p>

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