/* generates a random decimal number between 0 (inclusive) and up to 1 (exclusive). */
Math.random()
/* Round the number down to its nearest whole number. */
Math.floor()
/* x to the power of y */
Math.pow(num, 2)
/* Pi */
Math.PI;
/* Square root */
Math.sqrt(16);
/* Parse a string and return as integer. */
var int = parseInt("020"); // returns 20
/* Parse a string and return as float. */
var float = parseFloat("8.55"); // returns 8.55
/* Check if number is not float */
function isInt(n) {
return n % 1 === 0;
}