Question

Let's compare the various loop structures. As we did in last week's discussion, give a real world example of using various loops.

Can you give an example of when you might not be able to use a particular type of loop such as a For loop?

Answer 1

There are basically three types of looping structures.

• while
• do-while
• for

a while loop keeps executing a certain block of statements until a condition becomes false. Example , traversing a linked list until there are no more nodes to traverse.

do-while loop is used when we have to run a set of statements atleast once. Example, showing a menu of options to a user. We have to show the menu atleast once , the user might quit the very first time though.

for loops are usually preferred for their compactness because they have initialization , condition and updation statements in a single line. You can achieve what a for loop can with a while loop as well. Its just that for loops have better readability.

Answer 2

Answer 3