Circle Area from Input

Read a circle's radius (a decimal number) from standard input and print its area rounded to two decimal places. Use the formula area = 3.14159 * r * r with the value 3.14159 for PI. For example, if the input is 2, print the output shown in Expected Output.

Use printf with %.2f and no trailing newline.

Expected Output:

12.57

= newline. No newline after the last line.

Hints2 available

Topics:

User Input

Code Editor

Tab to indent (Esc then Tab to move on) · Ctrl+Enter to run · Shift+Alt+F to format · Ctrl+Space to expand shortcuts (p, fori)

Your Output

Run your code to see the output here...

Test Cases

Run your code to see test case results.