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<h3>Getting if...else</h3>
<hr>
<h4>If statement</h4>
<p>
An "if statement" is used to written by <b>if</b> keyword.<br>
<b>Syntax:</b>
<pre><code>
<b>if</b> condition:
statement()
</code></pre>
<b>Example:</b>
<pre><code>
M=144
N=169
condition
if N>M:
print("N is greater than M")
</code></pre>
<b>Output:</b>
<pre><code>
N is greter than M
</code></pre>
<p> In the above program, we use 2 variables <b>M</b> and <b>N</b> which are the part of <b>if</b> statement to test whether <b>N</b> is greater than <b>M</b> or not.<br>
Here,<b>N</b>=169 and <b>M</b>=144 as we can see <b>N</b> is greater than <b>M</b>. Therefore the output is <b>N is greter than M.</b></p>
<br>
<br>
<h4>Elif statement</h4>
<p>Basically elif in python is like else-if in C++. It says that if the current condition is not true then check the next condition.<br>
The keyword used is <b>elif</b> for this.</p>
<b>Syntax:</b>
<pre><code>
<b>if</b> condition 1:
statement(1)
<b>elif</b> condition 2:
statement(2)
</code></pre>
<b>Example:</b>
<pre><code>
M=200
N=100
if N>M:
print("N is greater than M")
elif M>N:
print("M is greater than N")
</code></pre>
<b>Output:</b>
<pre><code>
M is greater than N
</code></pre>
<p> In the above program, we use 2 variables again <b>M</b> and <b>N</b>.But here the twist is about the condition. As you can see here first condition is not satisfied therefore it went for next condition i.e <b>N>M</b> and it is True.<br>
Therefore, it prints <b>M is greater than N.</b></p>
<br>
<br>
<h4>Else statement</h4>
The <b>else</b> condition cover anything which cannot be covered by the previous conditions of <b>if</b> and <b>elif</b>.
<b>Syntax:</b>
<pre><code>
<b>if</b> condition 1:
statement(1)
<b>elif</b> condition 2:
statement(2)
<b>else:</b>
statement(3)
</code></pre>
<b>Note: else</b> does not contain any condition.<br>
<b>Example:</b>
<pre><code>
M=40
N=40
if N>M:
print("N is greater than M")
elif M>N:
print("M is greater than N")
else:
print("M is equal to N")
</code></pre>
<b>Output:</b>
<pre><code>
M is equal to N
</code></pre>
In the above program, both the previous conditon are not satisfied. Therefore the result is printed of <b>else</b> condition.<br>
<h4>Indentation</h4>
<p> Python depends on indentation(whitespace in the beginning of line) to define the scope.Therefore we have to give some whitespace as you can see in the above programs.<br></p>
<br>
<figure><figcaption><b>Flowchart of if,elif,else</b></figcaption>
<img src="pythonphoto/if_else.PNG" alt="flowchart of if,elif,else" width="50%">
</figure>
<pre><code>
M=90
N=100
if N>M:
print("N is greater than M") <b>#This will give you error</b>
</code></pre>
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