For Loops

A for loop visits each item in a group.

Like walking down a row of lockers and opening each one.

You write for, a name for the current item, in, then the group.

Then indent the steps to do for that item.

Loop over a list

The loop variable holds one item at a time.

You pick the name. pet, fruit, n, anything clear.

Loop over a string

A string is a row of characters.

for can visit each letter.

range for counting

range makes a stream of numbers.

enumerate for index and item

enumerate gives the place number and the item together.

Helpful when you need both.

break and continue

break stops the whole loop.

continue skips to the next item.

Nested for loops

A loop inside a loop is like shelves inside a cabinet.

The outer loop picks a shelf. The inner loop walks that shelf.

Tip: Name the loop variable after what it holds. Clear names make loops easy to read.