Some Useful JavaScript Functions

JavaScripts has many inbuilt functions

• Usual Maths functions for trigonometry, sin(), cos() etc.

It also has many other useful but not so obvious functions:

parseInt()

: takes in a string as parameter and returns it in integer format.,

parseFloat()

: takes a string as parameter and returns a floating point representation of it

eval()

: String versions of mathematical expressions can be passed into the function where they are evaluated and the result returned as an integer.

• Ideal for bringing simple interactivity to a page.
• For instance:

  eval("32 * 75674.21");