The browser storage localStorage is not available. Either your browser does not support it or you have disabled it or the maximum memory size is exceeded. Without localStorage your solutions will not be stored.
Mathoffers some mathematical constants.
Math.PIgives π (roughly 3.14) and
Math.Egives Euler's number e (roughly 2.71).
Write a function
areathat calculates the area of a circle. The function is given the radius of the circle.
4 * π.