In general, for loops are used when you know exactly how many times you plan to run a loop; a while loop is used when the number of iterations is uncertain. Note: The if statement is like a single ...

The first line, “if tasks:” asks Python to check if the tasks list is empty. If it isn’t, we’ll loop through it using a for loop. For loops have a defined starting and ending point.

This algorithm would allow five numbers to be inputted and would work out the total. A count-controlled loop would be used because it is known, in advance, how many times the algorithm needs to loop.

Yes/No’ say what the total is This algorithm would keep iterating until the answer at the end of the loop is ‘No’, ie it will continue to iterate WHILE there are more numbers to add.