Loops

While loops

While loops run the indented code repeatedly while the condition is True:

To skip to the next condition check you can use the continue statement:

So this example won't print out 3 as the continue statement will take the flow back to the condition check and then increment i to 4.

To break out a while loop you can use the break statement:

So this example, the last number printed will be 3 and then the while loop is ended.

To run code when the while loop finishes and the condition changes to False, use the else: statement:

The else section will only be ran if the loop naturally gets to the end and the condition changes to False. If the while loop has a break statement ran, then the else section is skipped.

For loops

To loop through 10 iterations from 0 -> 9:

To loop through 1 -> 10:

To loop through 2 -> 10, with a 2 step, so every other number:

You can use the break, continue and else: statements in a for loop, in the same way you can in a while loop.

To loop through a list:

To loop through a list and have the elements index:

The first variable after the for is for the index, and the second is for the value. You need to use the enumerate function to wrap the list.