The Math Object
Javascript (and some other languages) have built-in mathematics commands to simplify your life. In JS this is called the Math object.
The various abilities of the Math object can be found in various locations online. Here is a sampling of what you might use.
Code
Description
Math.PI
Returns 3.141592653589793
Math.pow(base, exponent)
Returns the base
raised to the exponent
Math.sqrt(number)
Returns the square root of the given number
Math.round(number)
Rounds the given number
to the nearest integer
Math.ceil(number)
Returns the number
rounded up to the nearest integer
Ex. Math.ceil(5.1)
returns 6
Math.floor(number)
Returns the number
rounded down to the nearest integer
Ex. Math.floor(5.8)
returns 5
Math.random()
Returns a pseudorandom decimal number between 0 and 1.
Use it in conjunction with Math.floor()
to return an integer.
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