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Like the majority of other programming languages, Python uses a FOR-loop, which is one of the most commonly used methods for iteration. The syntax is simple.
“ for I in [Python Iterable]:
Expression(i) “
In the section that says python iterable, you can fill in a tuple, list or any other data structures. Here is an example that will give you the factorial of a number.
“ fact=1
For I in range(1, N + 1):
Fact *= i “
When it comes to a conditional statement, you will use these to execute code fragments that are based upon a condition. The if-else is the most commonly used construct, and you can use this syntax:
“ if [condition]:
_execution if true_
Else:
_execution if false_ “
You could use this syntax if you want to print out whether the number S was odd or even.
“ if S%2 == 0:
Print ‘Even’
Else:
Print ‘Odd’ “
Now that you have a decent understanding of some Python fundamentals, we can dive a little be further. Think about having to perform these types of tasks:
1. Access web-pages
2. Make statistical models
3. Plot histograms and bar charts
4. Find the root of quadratic equations
5. Multiply two matrices
If you are trying to come up with code from scratch, it will end up becoming a nightmare, and you will end up leaving Python after a day or two. But we’re not going to worry about those things at the moment. There are a lot of predefined libraries that you can directly add to your code and make things a lot easier.
Here’s an example, if you take our factorial example from earlier, that can be changed into a single step.
“ math.factorial (S) “
In order for that to work, you will have to make sure that you have the math library. Now would be a good time to explore the libraries.
