(the number of people in the dance class). Loop, our program calculates the average age of members in the class. Property to tell our program how many times it should execute. That iterates through each item in the dancer_ages list and adds it to the Then, we add the age of each dancer to the To 0 because we need to declare a variable before it can be used. We will need this value to calculate the average later on. Which stores the total age of members in the class. Which stores the ages of each member in the dance class. The average age of members in the dance class is: 10. This value will help us calculate an average.
We would need to use the length property to retrieve the number of items in the list. Later, we decide that we want the average to be rounded to the nearest integer. We have a list that stores the dancers’ ages. Suppose that we wanted to find the average age of members in a dance class. The length property has a number of use cases in JavaScript, and one of the most common of these is calculating averages. In this case, there are six values in our list, so the length property returns: 6.Ĭalculating Averages with JavaScript Array length Then, we use the length property to find out the length of that list. New York Times Fiction Best Sellers of 2019 This constant stores a list of the books in our inventory that appeared on the When we execute our code, the program returns: 6.
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