First, you can’t just transport straight C for loops into Python. There has to be some concession to Python syntax. The initial attempt was clever but not clever enough.

How to use “for” loops in Python. There are two main types of loop across programming. These are “for” loops and “while” loops. For loops are used to run through a range – for ...

The ending value (4 in this case) in the range() function isn't printed because it's excluded from the range. while Loop The while loop is used when you're uncertain how long the loop will run.