Web Programming with HTML5, CSS, and JavaScript

9.13 Math Object Methods

To make processing numbers easier, JavaScript has more than 30 methods that perform mathematical operations. We don’t want to overwhelm you with all of them. In this section, we present the ones that tend to be used most often. In the last section, we introduced you to the Math.PI constant, which is a property of the Math object. This section’s methods, not surprisingly, are members of the Math object as well.

Take a look at the Math methods in FIGURE 9.17. They’re all pretty straightforward, but one thing you should be aware of is that if you use a variable for one of the arguments, the method calculates a value as described in the figure and returns that calculated value, but the argument variable’s value doesn’t ...