/**
* Calculate the area of a rectangle.
*
* length: The length of the rectangle.
* width: The width of the rectangle.
*
* Return a number denoting the rectangle's area.
**/
function getArea(length, width) {
let area;
// Write your code here
area = length * width;
return area;
}
/**
* Calculate the perimeter of a rectangle.
*
* length: The length of the rectangle.
* width: The width of the rectangle.
*
* Return a number denoting the perimeter of a rectangle.
**/
function getPerimeter(length, width) {
let perimeter;
// Write your code here
perimeter = 2 * (length + width);
return perimeter;
}
Functions
/*
* Create the function factorial here
*/
function factorial(n){
return n ? n * factorial(n - 1) : 1;
}
Let and Const
function main() {
// Write your code here. Read input using 'readLine()' and print output using 'console.log()'.
const PI = Math.PI;
let r = readLine();
// Print the area of the circle:
console.log(PI * r * r);
// Print the perimeter of the circle:
console.log(2 * PI * r);
try {
// Attempt to redefine the value of constant variable PI
PI = 0;
// Attempt to print the value of PI
console.log(PI);
} catch(error) {
console.error("You correctly declared 'PI' as a constant.");
}
}
