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  1. Prepare
  2. Tutorials
  3. 10 Days of Javascript
  4. Day 1: Let and Const

Day 1: Let and Const

Objective

In this challenge, we practice declaring variables using the let and const keywords. Check out the attached tutorial for more details.

Task

  1. Declare a constant variable, , and assign it the value Math.PI. You will not pass this challenge unless the variable is declared as a constant and named PI (uppercase).
  2. Read a number, , denoting the radius of a circle from stdin.
  3. Use and to calculate the and of a circle having radius .
  4. Print as the first line of output and print as the second line of output.

Input Format

A single integer, , denoting the radius of a circle.

Constraints

  • is a floating-point number scaled to at most decimal places.

Output Format

Print the following two lines:

  1. On the first line, print the of the circle having radius .
  2. On the second line, print the of the circle having radius .

Sample Input 0

2.6

Sample Output 0

21.237166338267002
16.336281798666924

Explanation 0

Given the radius , we calculate the following:

We then print as our first line of output and as our second line of output.