Concise If-Then-Else Statements in Python
In Python, expressing conditional statements on a single line is achieved using a ternary operator. This operator takes the form:
value_when_true if condition else value_when_false
As an example, let's write a one-line version of the following code:
<code class="python">if count == N: count = 0 else: count = N + 1</code>
Using the ternary operator, we can condense this to:
<code class="python">count = 0 if count == N else count + 1</code>
Improved Example
A more practical example is:
<code class="python">fruit = 'Apple' isApple = 'Yes' if fruit == 'Apple' else 'No'</code>
Assignment and Comparison with If Syntax
In Python, ternary operators are particularly useful for assignments and comparisons. For instance, the following code:
<code class="python">fruit = 'Apple' isApple = True if fruit == 'Apple' else False</code>
Can be written more concisely as:
<code class="python">fruit = 'Apple' isApple = fruit == 'Apple'</code>
However, when using complex conditions or multiple assignments, the explicit if syntax provides greater clarity.
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