A for loop is used to check for specific conditions and to be able to repeat a block of code, only if the conditions are met. In a for loop there are three parts to it, which are the:
- Initializer
2. Condition
3. Iteration
So, the initializer is where you initialize a counter variable to be able to start with. And then, after the initializer is the condition. The condition is where we specify a condition that must be true in order for the iteration. The iteration is the increase or decrease the counter. Below I will show an example of what this would look like:
for (var i = 0; i<5; i++)
{
Console.log(i);
}
This is an example of a for loop and where each step is used in the coding process. var i = 0 is the initializer, whereas i < 5 is a condition and it is going to check whether or not i is less than 5 or if it is not. The last and third portion is the i++ which is the iteration. I think that the for loop is the loop that I am able to comprehend the best from each kind of loop, and I have definitely been practicing the most with this specific one.
Hi Jessica,
This was a very detailed explanation of what a for loop does and how to write one. The picture and example of a for loop really helped me grasp the concept, and I definitely feel that I have a better understanding of how to implement for loops into my code now.
Hi Jessica,
This was a very detailed explanation of what a for loop does and how to write one. The picture and example of a for loop really helped me grasp the concept, and I definitely feel that I have a better understanding of how to implement for loops into my code now. I think it’s also worth to note that although for loops can be used by themselves, they can be embedded inside functions or even other for loops! For example, we could write a function that takes a parameter and based on that parameter, the loop will execute that many times. Alternatively, say we wanted to run through a set of data twice, we could use two for loops: one to iterate each data by itself, and another to compare that data to the other data in the loop.