[Python] Look into “for else”

Here is an explanation of how to use “for else” in Python:

The “for else” construct allows you to run a block of code once when a for loop finishes iterating without hitting a break statement. Here is the basic syntax:

for item in sequence:
    if condition:
        break
else:
    # code here will run if the for loop completes without hitting break

The else block will not execute if the for loop hits a break statement. This can be useful to run cleanup code if the loop exits normally, or to run error handling code if the loop exits prematurely.

Here is a simple example:

for i in range(5):
    if i == 3:
        break
else:
    print("Loop completed without hitting break")

This will print nothing since the loop hits break on i=3. But if we remove the break:

for i in range(5):
    if i == 10:
        break
else:
    print("Loop completed without hitting break") 

Now it will print “Loop completed without hitting break” since it iterated through the whole sequence without hitting break.

The for/else construct provides a way to detect if the entire loop executed normally after the loop terminates. This can be more convenient than setting a flag inside the loop to track its completion.