Loops

A for loop repeats a block of code a known number of times, or once for each item in a collection. It is the most common type of loop in Python.

Loops let a program repeat a block of code multiple times without writing it out over and over. They are one of the most powerful tools in programming.

A nested loop is a loop placed inside another loop. They are used to work with grids, tables, and any situation that requires repeating a repetition.

A while loop repeats a block of code for as long as a condition remains true. It is perfect when you do not know in advance how many times you need to repeat.