Anyone else think this is the worst possible test indication of understanding Let and Const and that the challenge here is understanding readLine()? Ha

function main() {

let r = readLine();
const PI = Math.PI;

// Print the area of the circle:
console.log(PI*r*r);
// Print the perimeter of the circle:
console.log(PI*2*r);

why is my code printing: 0

I'm curious as to why r**2 causes a runtime error

solution.js:29
    console.log(PI*(r**2));
                      ^
SyntaxError: Unexpected token *

Clean & correct

The challenge is called "Let and Const", but there's really no reason not to use const for both variables here. Let me know if you have any questions!

function main() {
    const PI = Math.PI;
    const r = parseFloat(readLine());

    console.log(PI * (r ** 2));
    console.log(2 * PI * r);

(From my HackerRank repo on GitHub.)

MY CODE let 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);

MY OUTPUT 21.237166338267002 16.336281798666924 0

is it me or hackerrank

Typo in that error message about PI? Incorrectly, not correctly.

:-)

const PI = Math.PI;
    var r = readLine();
    console.log(PI * r * r);
    console.log(2 * PI * r);

Given that readLine is an existing thing in Node, it's a bit confusing to just say the programmer should use readLine for managing input, when what you're actually referring to is a function already present in the starter code (which is also hidden by default).

const PI = Math.PI; let r = parseFloat(readLine()); var area = r * r * PI; var perimeter = 2 * PI * r; console.log(area); console.log(perimeter);