First, you can’t just transport straight C for loops into Python ... However, the disassembly of the Python code was telling. The second attempt, however, was particularly interesting.

In the following example, we loop through a list of numbers, and use the variable digit to hold each number in turn: Strings in Python are considered “sequences” — they can be iterated over ...

Be sure to indent the statements to repeat in the loop. We need to have at least one condition to ... print even # check the list print odd # check the list A function is a block of code that performs ...

Python can also be used to drive code-generation systems ... x in my_file] You could write such a thing as a formal for… loop in Python, much as you would in another language.

But as a fairly experienced Python developer, Crystal code still looks crystal clear! Here’s an example of a recursive loop that calculates factorials: Factorial calculation in Crystal.