let and const

Day 1: Let and Const| HackerRank Solution.

Day 1: Let and Const!!!

Hello programmers, today we are sharing proper solutions with all test cases passed on 10 Days of JavaScript by HackerRank.

As you all know JavaScript is the most popular and most challenging programming language to conquer but nowadays it’s not. There are some amazing platforms where that provide challenges in different languages and HackerRank is one of them.

In this challenge, we practice declaring variables using the let and const keywords.

Before checking out the solution it’s highly recommended to do it by yourself first because these challenges will help you to think about how to deal with these real-world problems.

Let’s get started.

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Problem: Let and Const in JavaScript

Functions in JavaScript

Overview: 10 Days of JavaScript| HackerRank Solution

function main() {
    // Write your code here. Read input using 'readLine()' and print output using 'console.log()'.
    const PI= Math.PI;
    var r = readLine();
    // Print the area of the circle:
    let area = PI*r*r;
    console.log(area);
    // Print the perimeter of the circle:
    let perimeter = 2*PI*r;
    console.log(perimeter);
    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.");
    }
}

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