Loops-What are they and why do we need them?

Loops are here to help us when we need to repeat several lines of code. There are three types of loops. For loops, While loops, and a Do-While loop. We use a for loop when we want to a line of code to run a specific amount of times. For example, if I wanted to alert a line that states “Last Discussion Post” 5 times, I would do the following. 

The for loop above alerts the line “Last Discussion Post” five times. We know this because i=0, which is us declaring what the value of i equals now. As long as i is less than or equal to five, which is what we did by writing “i<=5”, the code will run. Every time the code runs, i increases by one. We know this because we wrote “i++”.  So, because of everything we declared, when this program is run, it will display “Last Discussion Post” five times. 

When we don’t know the specific number of times to run a loop, we use a While loop. This loop will run a line of code until the statement within the loop is false.